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Pentium Chipset Specs

The chipsets whose names are blue italicized have not yet been released and the information is preliminary; some of it may be wrong. Take it with a grain of salt.

This chart may or may not be updated in the future. Yeah, I know, there are waaaay too many defunct and moldy chipset charts around, but nobody seemed to address the cacheability thing; which is what this page originally started out as.

Because certain chipsets share the same bus (notably the P6 bus), there may be some overlap of processors. Within each group the chipsets are listed in rough chronological order. Obviously not all chipsets are listed here.

North Bridge

Pentium/Pentium MMX Chipsets
ALi Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
ALi Aladdin III	P54C	FPM EDO SDRAM	?	?Mbit	256MB	?	N/A	50 60 66	1/2	512KB/?-bit ?MB WT ?MB WB
ALi Aladdin IV [M1531] [M1533]	P54C P55C Lin Burst	FPM EDO SDRAM	8	16Mbit 64Mbit	1GB	Both	N/A	50 60 66 75 83	1/2 2/5	1MB/11-bit 512MB WB
ALi Aladdin IV+ [M1531] [M1543]	P54C P55C Lin Burst	FPM EDO SDRAM Single SIMM	8	16Mbit 64Mbit	1GB	Both	N/A	50 60 66 75 83	1/2 2/5	1MB/11-bit 512MB WB
ALi Aladdin V [M1541] [M1543]	P54C P55C Lin Burst	FPM EDO SDRAM	8	16Mbit 64Mbit	1GB	Both	1x 2x	50 60 66 75 83 100	1/2 2/5 1/3	1MB/8-bit See Notes Below
ALi Aladdin V+ [M1541] [M1543]	P54C P55C Lin Burst	FPM EDO SDRAM	8	16Mbit 64Mbit 128Mbit 256Mbit	4GB	Both	1x 2x	50 60 66 75 83 95 100	1/2 2/5 1/3	1MB/8-bit See Notes Below
ALi Aladdin V+ (rev. F) [M1542] [M1543]	P54C P55C Lin Burst	FPM EDO SDRAM	8	16Mbit 64Mbit 128Mbit 256Mbit	4GB	Both	1x 2x	50 60 66 75 83 95 100	1/2 2/5 1/3	1MB/12-bit See Notes Below
ALi Aladdin 7 [M1561] [M1535D] ArtX 128-bit SMA	P54C P55C Lin Burst	SDRAM PC100	8	?Mbit	1GB	?	N/A	66 100	1/2 1/3 PCI 2.2	?MB/?-bit ?MB WB
AMD Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
AMD 640 [640] [645]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	768MB	Both	N/A	50 60 66	1/2	2MB/10-bit See Notes Below
~~AMD 640AGP~~ [ ? ] [VT82C586B]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	768MB	Both	1x 2x	66 100	1/2 1/3	?MB/?-bit ?MB WT ?MB WB
Intel Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
Intel 430LX {ISA} (Mercury) [82434LX] (PCMC) [82433LX] (LBX) [82378ZB] (SIO)	P5	FPM	6	16Mbit	192MB	Parity	N/A	60 66	1/2 PCI 2.0	512KB/9-bit 256MB WT 128MB WB
Intel 430LX {EISA} (Mercury) [82434LX] (PCMC) [82433LX] (LBX) [82374EB/SB] (ESC) [82375EB/SB] (PCEB)	P5	FPM	6	16Mbit	192MB	Parity	N/A	60 66	1/2 PCI 2.0	512KB/9-bit 256MB WT 128MB WB

Intel 430NX {ISA} (Neptune) [82434NX] (PCMC) [82433NX] (LBX) [82378ZB] (SIO)	P54C Uni	FPM	8	?Mbit	512MB	Parity	N/A	50 60 66	1/2 PCI 2.0	512KB/11-bit 512MB WB
Intel 430NX {ISA} (Neptune) [82434NX] (PCMC) [82433NX] (LBX) [82379AB] (SIO.A)	P54C Dual	FPM	8	?Mbit	512MB	Parity	N/A	50 60 66	1/2 PCI 2.0	512KB/11-bit 512MB WB
Intel 430NX {EISA} (Neptune) [82434NX] (PCMC) [82433NX] (LBX) [82374EB/SB] (ESC) [82375EB/SB] (PCEB)	P54C Dual	FPM	8	?Mbit	512MB	Parity	N/A	50 60 66	1/2 PCI 2.0	512KB/11-bit 512MB WB
Intel 430FX (Triton I) [82437FX] (TSC) [82438FX] (TDP) [82371FB] (PIIX)	P54C	FPM EDO	?	16Mbit	128MB	No	N/A	60 66	1/2 PCI 2.0	512KB/8-bit 64MB WB
Intel 430HX (Triton II) [82439HX] (TXC) [82371SB] (PIIX3)	P54C Dual P55C Dual	FPM EDO	8	16Mbit 64Mbit	512MB	Both	N/A	60 66	1/2	512KB/11-bit 512MB WB
Intel 430VX (Triton II/III) [82437VX] (TVX) [82438VX] (TDX) [82371SB] (PIIX3) UMA	P54C P55C	FPM EDO SDRAM	5	16Mbit	128MB	No	N/A	50 60 66	1/2	512KB/8-bit 64MB WB
Intel 430TX [82439TX] (MTXC) [82371AB] (PIIX4)	P54C P55C	FPM EDO SDRAM	6	16Mbit 64Mbit	256MB	No	N/A	50 60 66	1/2	512KB/8-bit 64MB WB
OPTi Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
OPTi Python [82C546] [82C547] [82C606] [82C822]	P5 P54C	FPM	4	16Mbit	128MB	?	N/A	50 60 66	1/1 1/2 2/3 VLB/PCI	512KB/?-bit ?MB WT ?MB WB
OPTi Cobra [82C596] [82C597] [82C606] [82C822]	P5 P54C	FPM	4	16Mbit	128MB	?	N/A	50 60 66	33MHz VLB/PCI	512KB/?-bit ?MB WT ?MB WB
OPTi Viper [82C556] [82C557] [82C558]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	Parity	N/A	50 60 66	1/2	512KB/8-bit 128MB WT 128MB WB
OPTi Viper-N [82C556] [82C557] [82C558N]	P54C P55C Lin Burst	FPM EDO	6	16Mbit 64Mbit	512MB	Parity	N/A	50 60 66	1/2	512KB/8-bit 128MB WT 128MB WB
OPTi Viper-N+ [82C556M] [82C557M] [82C558E]	P54C P55C Lin Burst	FPM EDO	6	16Mbit 64Mbit	512MB	Parity	N/A	50 60 66	1/2	512KB/8-bit 128MB WT 128MB WB
OPTi ViperMax [82C566] [82C567] [82C568] UMA	P54C P55C Lin Burst	FPM EDO BEDO SDRAM	6 F 6 E 4 B 4 S	16Mbit 64Mbit	512MB	Parity	N/A	50 60 66	1/2 Asynch	512KB/8-bit 128MB WT 128MB WB
OPTi Viper Xpress [82C576] [82C577] [82C578]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	Parity	N/A	40 50 60 66	1/2	512KB/?-bit ?MB WT ?MB WB
OPTi Vendetta [82C750]	P54C Lin Burst	FPM EDO SDRAM	8	16Mbit 64Mbit	512MB	Both	N/A	50 60 66	1/2	512KB/?-bit ?MB WT ?MB WB
SiS Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
SiS 501/02/03 [501] [502] [503]	P5 P54C	FPM EDO	4	16Mbit	128MB	No	N/A	50 60 66	1/2 2/3 14MHz	512MB/8-bit 128MB WT 64MB WB
SiS 5511/12/13 [5511] [5512] [5513]	P54C Dual	FPM EDO 2-way Interleave Single SIMM	4	16Mbit	512MB	Parity	N/A	50 60 66	1/2 Asynch	1MB/8-bit 256MB WT 128MB WB
SiS 5596 (Genesis) [5596] [5513] UMA	P54C	FPM EDO	4	16Mbit	512MB	No	N/A	50 60 66	1/2 Asynch	1MB/8-bit 256MB WT 128MB WB
SiS 5571 (Trinity) [5571]	P54C P55C Lin Burst	FPM EDO SDRAM Single SIMM	6 F 6 E 4 S	16MBit	384MB F 384MB E 256MB S	No	N/A	50 60 66 75	1/2 Asynch	512KB/8-bit 128MB WT 128MB WB
SiS 5597/98 (Jedi) [5597] UMA	P54C P55C Lin Burst	FPM EDO SDRAM Single SIMM	6	16Mbit 64Mbit	384MB	No	N/A	50 55 60 66 75	1/2 Asynch	512KB/8-bit 128MB WB
SiS 5581/82 [5581/82]	P54C P55C Lin Burst	FPM EDO SDRAM Single SIMM	6	16Mbit 64Mbit	384MB	No	N/A	50 55 60 66 75	1/2 Asynch	512KB/8-bit 128MB WB
SiS 5591/92 (David) [5591/92] [5595]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	768MB	No	1x 2x	50 60 66 75 83 100	1/2 Asynch	1MB/8-bit 256MB WB
SiS 530 (Sinbad) [530] [5595] SiS6326 AGP UMA	P54C P55C Lin Burst	SDRAM Mem=3/4 Bus Mem=4/5 Bus Mem=5/4 Bus	6	16Mbit 64Mbit	1.5GB	No	1x 2x	66 75 83 95 100	Asynch PCI 2.2	2MB/8-bit 256MB WB
SiS 540 [540] [950] [301] SiS300 AGP	P54C P55C	SDRAM PC133 VC SDRAM	6	16Mbit 64Mbit	1.5GB	ECC	1x 2x 4x	66 83 90 95 100	Asynch PCI 2.2	2MB/?-bit ?MB WB
VIA Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
VIA VP (580VP) [VT82C585VP] [VT82C586] [VT82C587VP] UMA	P54C Lin Burst	FPM EDO BEDO SDRAM Single SIMM	6	16Mbit	512MB	No	N/A	50 60 66	1/2	2MB/10-bit ~2GB WT ~2GB WB
VIA VP2 [VT82C595] [VT82C586A]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	ECC	N/A	50 60 66	1/2	2MB/10-bit ~2GB WT ~2GB WB
VIA VP2/97 [VT82C595] [VT82C586B]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	ECC	N/A	50 60 66	1/2	2MB/10-bit ~2GB WT ~2GB WB
VIA VPX [VT82C585] [VT82C586A]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	No	N/A	66 75	1/2 Asynch	2MB/10-bit ~2GB WT ~2GB WB
VIA VPX/97 [VT82C585] [VT82C586B]	P54C P55C Lin Burst	FPM EDO SDRAM	6	16Mbit 64Mbit	512MB	No	N/A	66 75	1/2 Asynch	2MB/10-bit ~2GB WT ~2GB WB
VIA VP3 [VT82C597/597AT] [VT82C586B]	P54C P55C Lin Burst	FPM EDO SDRAM ~~DDR SDRAM~~	6	16Mbit 64Mbit	1GB	Both	1x 2x	50 60 66	1/2	2MB/10-bit ~2GB WT ~2GB WB
VIA MVP3 [VT82C598/598AT] [VT82C586B]	P54C P55C Lin Burst	FPM EDO SDRAM Mem=AGP	6	16Mbit 64Mbit	1GB	Both	1x 2x	66 75 83 100	1/2 2/5 1/3	2MB/8-bit 510MB WT 254MB WB
VIA MVP4 [VT8501] [VT82C686A] Trident Blade3D AGP	P54C P55C Lin Burst	FPM EDO SDRAM VC SDRAM Mem=AGP	6	16Mbit 64Mbit	768MB	Both	1x 2x	66 75 83 100	1/2 2/5 1/3	2MB/8-bit 510MB WT 254MB WB
VLSI Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
VLSI Lynx [82C541] [82C543]	P54C	FPM EDO SDRAM	?	?Mbit	256MB	?	N/A	50 60 66	1/2 Asynch	512KB/?-bit ?MB WT ?MB WB

Pentium Pro/Pentium II/Pentium III Chipsets
ALi Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
ALi Aladdin Pro [ ? ] [ ? ]	P-II	FPM EDO SDRAM	?	16Mbit 64Mbit	?	Both	1x 2x	60 66	1/2	N/A
ALi Aladdin Pro II [M1621] [M1543]	P-II Dual	FPM EDO SDRAM	8	16Mbit 64Mbit	2GB F 2GB E 1GB S	Both	1x 2x	60 66 100	1/2 1/3	N/A
ALi Aladdin TNT2 [M1631] [M1535D] TNT2 AGP UMA	P-III Celeron	EDO SDRAM PC133 VC SDRAM	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	ECC	1x 2x	66 100	1/2 1/3 PCI 2.2	N/A
ALi Aladdin Pro 4 [M1641B] [M1535D]	P-III Celeron	EDO SDRAM PC133 VC SDRAM	8	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	ECC	1x 2x 4x	66 100	1/2 1/3 PCI 2.2	N/A
~~ALi ?~~ [M1642] [M1535D] ? AGP	P-III Celeron	SDRAM PC133 DDR SDRAM VC SDRAM	8	16Mbit 64Mbit 128Mbit 256Mbit	?GB	ECC	1x 2x 4x	100 133	1/3 1/4 PCI 2.2	N/A
ALi CyberAladdin [M1644] [M1535D+] Cyberblade XT UMA	P-III Celeron	SDRAM PC133 DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	ECC	1x 2x 4x	100 133	1/3 1/4 Asynch PCI 2.2	N/A
ALi CyberAladdin-T [M1644] [M1535D+] Cyberblade XT UMA	P-III P-III(T) Celeron	SDRAM PC133 DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	ECC	1x 2x 4x	100 133	1/3 1/4 Asynch PCI 2.2	N/A
ALi Aladdin Pro 5 [M1651] [M1535D+]	P-III Celeron	SDRAM PC133 VC SDRAM DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	ECC	1x 2x 4x	100 133	1/3 1/4 Asynch PCI 2.2	N/A
ALi Aladdin Pro 5T [M1651T] [M1535D+]	P-III P-III(T) Celeron	SDRAM PC133 VC SDRAM DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	ECC	1x 2x 4x	100 133	1/3 1/4 Asynch PCI 2.2	N/A
ATI Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
ATI S1-370 TL [S1-370 TL] [M1535D] ArtX 128-bit UMA	P-III Celeron	SDRAM PC133	?	?Mbit	?GB	?	N/A	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
~~ATI ???~~ [ ? ] [ ? ] Radeon 7000 AGP	P-III Celeron	DDR PC2100	?	?Mbit	?GB	?	1x 2x 4x 8x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
Intel 450GX (Orion) [82454GX] (PB) [82453GX] (DC) [82452GX] (DP) [82451GX] (MIC) UMA	P-Pro Quad	FPM 2-way Interleave 4-way Interleave	8	16Mbit 64Mbit	4GB	Both	N/A	60 66	1/2	N/A
Intel 450KX (Mars) [82454KX] (PB) [82453KX] (DC) [82452KX] (DP) [82451KX] (MIC) UMA	P-Pro Dual	FPM 2-way Interleave	8	16Mbit 64Mbit	1GB	Both	N/A	60 66	1/2	N/A
Intel 440FX (Natoma) [82441FX] (PMC) [82442FX] (DBX) [82371SB] (PIIX3)	P-Pro Dual P-Pro OD Dual P-II Dual	FPM EDO BEDO	8	16Mbit 64Mbit	1GB	Both	N/A	50 60 66	1/2	N/A

Intel 440LX [82443LX] (PAC) [82371AB] (PIIX4)	P-II Dual Celeron	EDO SDRAM	8	16Mbit 64Mbit	1GB E 512MB S	Both	1x 2x	66	1/2	N/A
Intel 440BX [82443BX] (PAC) [82371EB] (PIIX4E)	P-II Dual P-III Dual Celeron	EDO SDRAM Reg SDRAM ESDRAM	6 E 8 S 8 Reg 8 ESD	16Mbit 64Mbit 128Mbit	1GB	Both	1x 2x	66 100	1/2 1/3 1/4	N/A
Intel 440EX [82443EX] (PAC) [82371AB/EB] (PIIX4/4E)	P-II Celeron	EDO SDRAM	4	16Mbit 64Mbit	256MB	No	1x 2x	66	1/2	N/A
Intel 440ZX [82443ZX] (PAC) [82371EB] (PIIX4E)	P-II Celeron	EDO SDRAM	4	16Mbit 64Mbit	256MB	No	1x 2x	66 100	1/2 1/3	N/A
Intel 440ZX66 [82443ZX] (PAC) [82371EB] (PIIX4E)	Celeron	EDO SDRAM	4	16Mbit 64Mbit	256MB	No	1x 2x	66	1/2	N/A
Intel 810L (Whitney) [82810] (GMCH) [82801AB] (ICH0) [82802] (FWH) i752 AGP (Portola)	Celeron	SDRAM PC100 Asynch Mem	4	16Mbit 64Mbit 128Mbit	512MB	No	1x 2x	66 100	1/2 1/3 PCI 2.2	N/A
Intel 810 (Whitney) [82810] (GMCH) [82801AA] (ICH) [82802] (FWH) i752 AGP (Portola)	Celeron	SDRAM PC100 Asynch Mem	4	16Mbit 64Mbit 128Mbit	512MB	No	1x 2x	66 100	1/2 1/3 PCI 2.2	N/A
Intel 810-DC100 (Whitney) [82810-DC100] (GMCH) [82801AA] (ICH) [82802] (FWH) i752 AGP (Portola)	Celeron	SDRAM PC100 Asynch Mem	4	16Mbit 64Mbit 128Mbit	512MB	No	1x 2x	66 100	1/2 1/3 PCI 2.2	N/A
Intel 810e-DC133 (Whitney) [82810E-DC133] (GMCH) [82801AA] (ICH) [82802] (FWH) i752 AGP (Portola)	P-III P-III(T) Celeron See Notes Below	SDRAM PC100 Asynch Mem	4	16Mbit 64Mbit 128Mbit	512MB	No	1x 2x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 820 (Camino) [82820] (MCH) [82801AA] (ICH) [82802] (FWH) ~~[82805AA] (MTH)~~	P-III Dual Celeron	SDRAM PC100 Reg SDRAM RDR PC800 ~~Asynch SDRAM~~	--	64Mbit 128Mbit 256Mbit	512MB S 1GB Reg 1GB RDR	ECC	1x 2x 4x	100 133	1/3 1/4 PCI 2.2	N/A
Intel 815 (Solano) [82815] (GMCH) [82801AA] (ICH) [82802] (FWH) i754 AGP (Coloma)	P-III P-III(T) Celeron See Notes Below	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 815e (Solano-2) [82815] (GMCH) [82801BA] (ICH2) [82802] (FWH) i754 AGP (Coloma)	P-III P-III(T) Celeron See Notes Below	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 820e (Camino-2) [82820] (MCH) [82801BA] (ICH2) [82802] (FWH)	P-III Dual Celeron	RDR PC800	--	64Mbit 128Mbit 256Mbit	1GB	Yes	1x 2x 4x	100 133	1/3 1/4 PCI 2.2	N/A
Intel 815p (Solano-3) [82815P] (MCH) [82801AA] (ICH) [82802] (FWH)	P-III P-III(T) Celeron See Notes Below	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 815ep (Solano-3) [82815P] (MCH) [82801BA] (ICH2) [82802] (FWH)	P-III P-III(T) Celeron See Notes Below	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 810e2-DC133 (Whitney) [82810E-DC133] (GMCH) [82801AA] (ICH2) [82802] (FWH) i752 AGP (Portola)	P-III P-III(T) Celeron See Notes Below	SDRAM PC100 Asynch Mem	4	16Mbit 64Mbit 128Mbit	512MB	No	1x 2x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 815g (Solano-3) [82815G] (GMCH) [82801AA] (ICH) [82802] (FWH) i754 AGP (Coloma)	P-III P-III(T) Celeron	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
Intel 815eg (Solano-3) [82815G] (GMCH) [82801BA] (ICH2) [82802] (FWH) i754 AGP (Coloma)	P-III P-III(T) Celeron	SDRAM PC133	6	64Mbit 128Mbit 256Mbit	512MB	No	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
~~Intel 830P~~ (Almador) [82830P] (MCH) [82801CA] (ICH3)	P-III P-III(T) Celeron	SDRAM PC133	?	64Mbit 128Mbit 256Mbit 512Mbit	1GB	No	1x 2x 4x	133	1/4 PCI 2.2	N/A
~~Intel 830G~~ (Almador) [82830G] (GMCH) [82801CA] (ICH3) ? AGP	P-III P-III(T) Celeron	SDRAM PC133	?	64Mbit 128Mbit 256Mbit 512Mbit	1GB	No	1x 2x 4x	133	1/4 PCI 2.2	N/A

Intel 440GX [82443GX] (PAC) [82371EB] (PIIX4E)	P-II Dual P-III Dual P-II Xeon Dual P-III Xeon Dual	SDRAM Reg SDRAM	8	16Mbit 64Mbit 128Mbit 256Mbit	2GB	Both	1x 2x	100	1/3	N/A
Intel 450NX [82454NX] (PXB) [82453NX] (MUX) [82452NX] (RCG) [82451NX] (MIOC) [82371EB] (PIIX4E)	P-II Xeon Quad P-III Xeon Quad	FPM EDO 2-way Interleave 4-way Interleave	8	16Mbit 64Mbit	8GB	Both	N/A	90 100	1/3	N/A
Intel 840 (Carmel) [82840] (MCH) [82801AA] (ICH) [82802] (FWH) [82803AA] (MRH-R) ~~[82804AA] (MRH-S)~~ [82806AA] (P64H)	P-III Dual P-III Xeon Quad	SDRAM PC100 Reg SDRAM RDR DC PC800 ~~Asynch SDRAM~~	--	64Mbit 128Mbit 256Mbit	4GB S 8GB Reg 4GB RDR	ECC	1x 2x 4x	100 133	1/3 1/4	N/A
Intel Profusion [ ? ] [ ? ]	P-III Xeon Oct	SDRAM PC100 2-way Interleave	?	?Mbit	32GB	ECC	N/A	100	1/3 PCI-66/64	N/A
Micron Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
Micron Samurai [ ? ] [VT82C586B]	PII Dual	FPM EDO SDRAM	8	16Mbit 64Mbit	1GB	Yes	N/A	66	PCI-66/64	N/A
*Micron Samurai DDR* (Copperhead) [ ? ] [ ? ] (Coppertail)	PIII Dual PIII(T) Dual P-III-S Dual	DDR PC? Reg DDR	?	512Mbit	4GB DDR 8GB Reg	Yes	1x 2x 4x	100 133	PCI-X PCI 2.2	N/A
OPTi Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
OPTi Discovery [82C650] [82C651]	P-Pro P-Pro OD	?	?	?Mbit	?MB	?	N/A	?	?	N/A
ServerWorks Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
SW Serverset III LE [NB6635] (CNB30LE) [NB6566] (CIOB20)	P-III Dual P-III-S Dual P3 Xeon Dual	SDRAM PC133 Reg SDRAM	?	?Mbit	4GB	ECC	N/A	100 133	1/3 1/4 PCI-66/64	N/A
SW Serverset III HE [NB6536] (CNB20HE) [NB6566] (CIOB20) [NB6555IO] (OSB4) [NB6535] (MADP)	P-III Dual P-III-S Dual P-III Xeon Quad	SDRAM QC PC133 4-way Interleave	?	?Mbit	16GB	ECC	N/A	100 133	1/3 1/4 PCI-66/64	N/A
SW Serverset III WS [NB6536] (CNB20HE) [NB6566] (CIOB20) [NB6555] (AOB2) [NB6525] (MADP)	P-III Dual P-III-S Dual P-III Xeon Dual	SDRAM DC PC133 2-way Interleave	?	?Mbit	8GB	ECC	4x	100 133	1/3 1/4 PCI-66/64	N/A
SW Serverset III HESL [NB-HESL] [CIOB2] [CSB5]	P-III Dual P-III-S Dual P-III Xeon Dual	SDRAM DC PC133 2-way Interleave	?	?Mbit	12GB	ECC Chipkill	N/A	100 133	1/3 1/4 PCI-66/64	N/A
SiS Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
SiS 5600 [5600] [5595]	P-II Dual	FPM EDO SDRAM	6	16Mbit 64Mbit	1.5GB	ECC	1x 2x	60 66 100	1/2 1/3	N/A
SiS 600 [600] [5595]	P-II Dual	FPM EDO SDRAM	6	16Mbit 64Mbit	1.5GB	ECC	1x 2x	60 66 100	1/2 1/3	N/A
SiS 620 [620] [5595] SiS6326 AGP UMA	P-II	SDRAM Mem=3/4 Bus Mem=4/5 Bus Mem=5/4 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x	60 66 75 83 100	Asynch PCI 2.2	N/A
~~SiS 621~~ [621] [5595] SiS6326 AGP	P-II	SDRAM	?	?Mbit	?GB	?	1x 2x 4x	66 100	Asynch PCI 2.2	N/A
SiS 630 [630] SiS301 AGP UMA	P-III Celeron	SDRAM PC133 VC SDRAM Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	66 100 133	Asynch PCI 2.2	N/A
SiS 630S [630S] SiS301 AGP	P-III Celeron	SDRAM PC133 VC SDRAM Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	66 100 133	Asynch PCI 2.2	N/A
SiS 630E [630E] SiS301 AGP	P-III Celeron	SDRAM PC133 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	66 100 133	Asynch PCI 2.2	N/A
SiS 633 [633]	P-III	SDRAM PC133 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	66 100 133	PCI 2.2	N/A
SiS 635 [635]	P-III	SDRAM PC133 DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	66 100 133	PCI 2.2	N/A
SiS 635T [635T]	P-III P-III(T)	SDRAM PC133 DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	66 100 133	PCI 2.2	N/A
SiS 630ST [630ST] SiS301 AGP	P-III P-III(T) Celeron	SDRAM PC133 VC SDRAM Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	66 100 133	Asynch PCI 2.2	N/A
SiS 633T [633T]	P-III P-III(T)	SDRAM PC133 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	66 100 133	PCI 2.2	N/A
SiS 630ET [630ET] SiS301 AGP	P-III P-III(T) Celeron	SDRAM PC133 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	66 100 133	Asynch PCI 2.2	N/A
~~SiS 640T~~ [640T] [961] SiS 315 AGP	P-III P-III(T)	SDRAM PC133 DDR SDRAM	?	?Mbit	1.5GB	?	1x 2x 4x	66 100 133	PCI 2.2	N/A
VIA Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
VIA Apollo [VT82C685] [VT82C586] [VT82C687]	P-Pro Dual P-Pro OD Dual	FPM EDO	8	16Mbit 64Mbit	1GB	?	N/A	66	1/2	N/A

VIA Apollo Pro [VT82C691] [VT82C586B]	P-Pro P-Pro OD P-II	FPM EDO SDRAM ~~DDR SDRAM~~ ESDRAM VC SDRAM Mem=AGP	8	16Mbit 64Mbit	1GB	Both	1x 2x	66 100	1/2 2/5 1/3	N/A
VIA Apollo Pro+ [VT82C693] [VT82C596A]	P-Pro P-Pro OD P-II	FPM EDO SDRAM VC SDRAM Mem=AGP	8	16Mbit 64Mbit 128Mbit	1GB	Both	1x 2x	66 100	1/2 2/5 1/3	N/A
VIA Apollo Pro133 [VT82C693A] [VT82C596B]	P-III Celeron	FPM EDO SDRAM PC133 VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	Both	1x 2x	66 100 133	1/2 2/5 1/3 1/4 PCI 2.2	N/A
VIA Apollo Pro133A [VT82C694X] [VT82C596B]	P-III Dual Celeron	FPM EDO SDRAM PC133 Reg SDRAM ESDRAM VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	8	16Mbit 64Mbit 128Mbit 256Mbit	2GB 4GB Reg	Both	1x 2x 4x	66 100 133	1/2 2/5 1/3 1/4 PCI 2.2	N/A
VIA PLE133 (PM601) [VT8601] [VT8231] Trident Blade3D AGP	P-III Celeron	FPM EDO SDRAM PC133 VC SDRAM Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA PL-133 [VT8604] [VT8231] Savage4 AGP	P-III Celeron	FPM EDO SDRAM PC133 ESDRAM VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	Both	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA PM-133 (VS1-P6) [VT8605] [VT8231] Savage4 AGP	P-III Celeron	FPM EDO SDRAM PC133 ESDRAM VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	Both	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA Apollo Pro266 [VT8633] [VT8233]	P-III Celeron	SDRAM PC133 Reg SDRAM VC SDRAM DDR PC2100	8	128Mbit 256Mbit 512Mbit	2GB	ECC	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA PLE133T [VT8602] [VT8231] Trident Blade3D AGP	P-III P-III(T) Celeron	FPM EDO SDRAM PC133 VC SDRAM Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA PL-133T [VT8604T] [VT8231] Savage4 AGP	P-III P-III(T) Celeron	FPM EDO SDRAM PC133 ESDRAM VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	Both	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
VIA Apollo Pro133T [VT82C694T] [VT82C596B]	P-III P-III(T) Celeron	FPM EDO SDRAM PC133 Reg SDRAM ESDRAM VC SDRAM Mem=AGP Mem=2/3 Bus Mem=3/4 Bus Mem=4/3 Bus Mem=3/2 Bus	8	16Mbit 64Mbit 128Mbit 256Mbit	2GB 4GB Reg	Both	1x 2x 4x	66 100 133	1/2 2/5 1/3 1/4 PCI 2.2	N/A
VIA Apollo Pro266T [VT8653] [VT8233] [VT8101] (VPX)	P-III P-III(T) Celeron	SDRAM PC133 Reg SDRAM VC SDRAM DDR PC2100 Reg DDR	8	128Mbit 256Mbit 512Mbit	4GB	ECC	1x 2x 4x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A
~~VIA PM-266T~~ (VS10-P6) [VT8608] [ ? ] Savage4 AGP	P-III P-III(T) Celeron	SDRAM PC133 DDR PC2100	?	?Mbit	?GB	?	1x 2x 4x	100 133	1/3 1/4 PCI 2.2	N/A
~~VIA Apollo Pro333T~~ [ ? ] [ ? ]	P-III P-III(T) Celeron	SDRAM PC133 Reg SDRAM DDR PC2700 Reg DDR	?	?Mbit	?GB	ECC	1x 2x 4x 8x	66 100 133	1/2 1/3 1/4 PCI 2.2	N/A

Athlon/Duron Chipsets
ALi Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
ALi MAGiK 1 [M1647] [M1535D+]	Athlon Duron	SDRAM PC133 DDR PC2100 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Asynch PCI 2.2	N/A
~~ALi MAGiK 2~~ [M1648] [ ? ] ? AGP	Athlon Duron	SDRAM PC133 DDR PC2100	?	?Mbit	?GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Asynch PCI 2.2	N/A
~~ALi Aladdin K7 III~~ [M1657] [ ? ]	Athlon Duron	SDRAM PC133 DDR PC2100	?	?Mbit	?GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Asynch PCI 2.2	N/A
~~ALi ?~~ [M1667] [M1563]	Athlon Duron	SDRAM PC133 DDR PC2700	?	?Mbit	?GB	?	1x 2x 4x 8x	100 (x2) 133 (x2)	?	N/A
AMD Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
AMD 750 [751] (Irongate) [756] (Viper)	Athlon Duron	SDRAM PC100	8	16Mbit 64Mbit 128Mbit	768MB	ECC	1x 2x	100 (x2)	1/3 PCI 2.2	N/A
AMD 760 [761] (Irongate-4) [766]	Athlon Duron	DDR PC2100 Reg DDR	8	64Mbit 128Mbit 256Mbit 512Mbit	2GB 4GB Reg	ECC	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 PCI 2.2	N/A
AMD 760MP [762] (Irongate-4) [766]	Athlon MP Dual	Reg DDR PC2100	8	64Mbit 128Mbit 256Mbit 512Mbit	4GB	ECC	1x 2x 4x	100 (x2) 133 (x2)	Pseudosynch PCI 2.2	N/A
AMD 760MPX [762] (Irongate-4) [768]	Athlon MP Dual	Reg DDR PC2100	8	64Mbit 128Mbit 256Mbit 512Mbit	4GB	ECC	1x 2x 4x	100 (x2) 133 (x2)	Pseudosynch PCI-66/64 PCI 2.2	N/A
~~AMD 770~~ [ ? ] [ ? ]	Athlon MP Dual	DDR PC?	8	?Mbit	?GB	Yes	1x 2x 4x	100 (x2) 133 (x2)	Pseudosynch	N/A
ATI Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
ATI IGP 320 [IGP 320] [IXP 200] Radeon 7000 AGP	Athlon Duron	SDRAM PC133 DDR PC2100	?	?Mbit	?GB	?	1x 2x 4x 1.5v	100 (x2) 133 (x2)	?	N/A
~~ATI ???~~ [IGP ?] [IXP ?] Radeon 8500 AGP	Athlon Duron	SDRAM PC133 DDR PC2700	?	?Mbit	?GB	?	1x 2x 4x 1.5v	100 (x2) 133 (x2)	?	N/A
Micron Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
~~Micron Samurai K7~~ [ ? ] [ ? ]	Athlon Dual	DDR SDRAM	?	?Mbit	?GB	Yes	1x 2x 4x	100 (x2)	PCI-66/64	N/A
~~Micron Mamba~~ [4400e] [ ? ]	Athlon	DDR SDRAM	?	?Mbit	?GB	Yes	1x 2x 4x	133 (x2)	PCI-X	8MB L3/?-bit
~~Micron Shogun~~ [ ? ] [ ? ] Rendition AGP	Athlon	DDR SDRAM	?	?Mbit	?GB	Yes	1x 2x 4x	133 (x2)	PCI-X	8MB L3/?-bit
~~Micron Scimitar~~ [ ? ] [ ? ] Rendition AGP	Athlon	DDR SDRAM	?	?Mbit	?GB	Yes	1x 2x 4x	133 (x2)	?	8MB L3/?-bit
NVidia Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
NVidia nForce220 (Crush11) [IGP-64] [MCP] GeForce2 MX	Athlon Duron	SDRAM PC133 DDR PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce220D (Crush11) [IGP-64] [MCP-D] GeForce2 MX	Athlon Duron	SDRAM PC133 DDR PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce420 (Crush12) [IGP-128] [MCP] GeForce2 MX	Athlon Duron	SDRAM DC PC133 DDR DC PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce420D (Crush12) [IGP-128] [MCP-D] GeForce2 MX	Athlon Duron	SDRAM DC PC133 DDR DC PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce415D (Crush12) [IGP-128] [MCP-D]	Athlon Duron	SDRAM DC PC133 DDR DC PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce620D (Crush?) [IGP-128/333] [MCP-D] GeForce2 MX	Athlon Duron	SDRAM DC PC133 DDR DC PC2700 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce615D (Crush?) [IGP-128/333] [MCP-D]	Athlon Duron	SDRAM DC PC133 DDR DC PC2700 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce2-ST SPP (Crush18) [ ? ] [MCP-T]	Athlon Duron	DDR DC PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce2-GT IGP (Crush18) [ ? ] [MCP-T] GeForce4 MX	Athlon Duron	DDR DC PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce230 (Crush11) [IGP-64] [MCP[2]] GeForce2 MX	Athlon Duron	SDRAM PC133 DDR PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce230-T (Crush11) [IGP-64] [MCP-T] GeForce2 MX	Athlon Duron	SDRAM PC133 DDR PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce430 (Crush12) [IGP-128] [MCP[2]] GeForce2 MX	Athlon Duron	SDRAM DC PC133 DDR DC PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce430-T (Crush12) [IGP-128] [MCP-T] GeForce2 MX	Athlon Duron	SDRAM DC PC133 DDR DC PC2100 Asynch Mem	6	64Mbit 128Mbit 256Mbit 512Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	Asynch	N/A
NVidia nForce2-S SPP (Crush18) [ ? ] [MCP[2]]	Athlon Duron	DDR DC PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2)	Asynch	N/A
NVidia nForce2-G IGP (Crush18) [ ? ] [MCP[2]] GeForce4 MX	Athlon Duron	DDR DC PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2)	Asynch	N/A
NVidia nForce2 400 (Crush18) [ ? ] [MCP[2]]	Athlon Duron	DDR PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2) 200 (x2)	Asynch	N/A
NVidia nForce2 Ultra 400 (Crush18) [ ? ] [MCP-T]	Athlon Duron	DDR PC3200	6	?Mbit	3GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2) 200 (x2)	Asynch	N/A
SiS Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
SiS 730S [730S] SiS301 AGP	Athlon Duron	SDRAM PC133 Asynch Mem	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2)	PCI 2.2	N/A
SiS 733 [733]	Athlon Duron	SDRAM PC133	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	PCI 2.2	N/A
SiS 735 [735]	Athlon Duron	SDRAM PC133 DDR PC2100 Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	PCI 2.2	N/A
SiS 745 [745]	Athlon Duron	SDRAM PC133 DDR PC2700 Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	1x 2x 4x	100 (x2) 133 (x2)	?	N/A
SiS 746 [746] [963]	Athlon Duron	SDRAM PC133 DDR PC2700	6	16Mbit 64Mbit 128Mbit 256Mbit	?GB	No	4x 8x 1.5v	100 (x2) 133 (x2)	1/3 1/4 PCI 2.2	N/A
SiS 746FX [746FX] [963L]	Athlon Duron	SDRAM PC133 DDR PC3200	6	16Mbit 64Mbit 128Mbit 256Mbit	3GB	No	4x 8x 1.5v	100 (x2) 133 (x2) 166 (x2)	1/3 1/4 1/5 PCI 2.2	N/A
SiS 748 [748] [963L]	Athlon Duron	SDRAM PC133 DDR PC3200	6	16Mbit 64Mbit 128Mbit 256Mbit	3GB	No	4x 8x 1.5v	100 (x2) 133 (x2) 166 (x2) 200 (x2)	1/3 1/4 1/5 1/6 PCI 2.2	N/A
~~SiS 746DX~~ [746DX] [963]	Athlon Duron	SDRAM PC133 DDR PC3200	6	16Mbit 64Mbit 128Mbit 256Mbit	?GB	No	1x 2x 4x 8x	100 (x2) 133 (x2)	1/3 1/4 PCI 2.2	N/A
SiS 740 [740] [961] SiS 315 AGP	Athlon Duron	SDRAM PC133 DDR PC2100	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 PCI 2.2	N/A
~~SiS 750~~ [750] [961] SiS 330 AGP	Athlon Duron	SDRAM PC133 DDR PC?	?	?Mbit	1.5GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 PCI 2.2	N/A
SiS 741 [741] [964] SiS 301B AGP	Athlon Duron	DDR PC3200	6	64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	4x 8x 1.5v	100 (x2) 133 (x2) 166 (x2) 200 (x2)	1/3 1/4 1/5 1/6 PCI 2.2	N/A
SiS 741GX [741GX] [964] SiS 301B UMA	Athlon Duron	DDR PC2700	6	64Mbit 128Mbit 256Mbit 512Mbit	3GB	No	4x 8x 1.5v	100 (x2) 133 (x2) 166 (x2)	1/3 1/4 1/5 1/6 PCI 2.2	N/A
VIA Chipsets	Typical CPUs	DRAM Types	Mem Rows	DRAM Density	Max Mem	ECC/ Parity	AGP	Bus Speeds	PCI Clock Dividers	Max L2/ Tag bits
VIA KX-133 [VT8371] [VT82C686A]	Athlon	EDO SDRAM PC133 ESDRAM VC SDRAM Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	2GB	Both	1x 2x 4x	100 (x2)	1/3 Pseudosynch PCI 2.2	N/A
VIA KT-133 [VT8363] [VT82C686A]	Athlon Duron	SDRAM PC133 ESDRAM VC SDRAM Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2)	1/3 Pseudosynch PCI 2.2	N/A
VIA KM-133 (VS2-K7) [VT8365] [VT8231] Savage4 AGP	Athlon Duron	FPM EDO SDRAM PC133 VC SDRAM	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2)	1/3 Pseudosynch PCI 2.2	N/A
VIA KT-133E [VT8363E] [VT82C686B]	Athlon Duron	SDRAM PC133 ESDRAM VC SDRAM Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2)	1/3 Pseudosynch PCI 2.2	N/A
VIA KT-133A [VT8363A] [VT82C686A]	Athlon Duron	SDRAM PC133 ESDRAM VC SDRAM Mem=4/3 Bus	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KT-266 [VT8366] [VT8233]	Athlon Duron	SDRAM PC133 Reg SDRAM VC SDRAM DDR PC2100 Reg DDR Mem=3/4 Bus Mem=4/3 Bus Mem=AGP	6 S 8 Reg	64Mbit 128Mbit 256Mbit 512Mbit	3GB S 4GB Reg	Both	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KLE133 [VT8361] [VT82C686B] Trident Blade 3D	Athlon Duron	SDRAM PC133 VC SDRAM	?	?Mbit	2GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KL-133 [VT8364] [VT82C686B] Savage4 AGP	Athlon Duron	SDRAM PC133 VC SDRAM	?	16Mbit 64Mbit 128Mbit 256Mbit	1GB	?	1x 2x 4x	100 (x2)	1/3 Pseudosynch PCI 2.2	N/A
VIA KL-133A [VT8364A] [VT82C686B] Savage4 AGP	Athlon Duron	SDRAM PC133 VC SDRAM	?	16Mbit 64Mbit 128Mbit 256Mbit	1GB	?	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KM-133A (VS2-K7) [VT8365A] [VT8231] Savage4 AGP	Athlon Duron	FPM EDO SDRAM PC133 VC SDRAM	6	16Mbit 64Mbit 128Mbit 256Mbit	1.5GB	No	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KT-266A [VT8366A] [VT8233]	Athlon Duron	SDRAM PC133 Reg SDRAM DDR PC2100 Reg DDR Mem=3/4 Bus Mem=4/3 Bus Mem=AGP	6 S 8 Reg	64Mbit 128Mbit 256Mbit 512Mbit	3GB S 4GB Reg	Both	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
~~VIA KT-266DP~~ [ ? ] [VT8233A]	Athlon MP Dual	SDRAM PC133 Reg SDRAM DDR PC2100 Reg DDR	6 S 8 Reg	64Mbit 128Mbit 256Mbit 512Mbit	3GB S 4GB Reg	ECC	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KM-266 (VS12-K7) [VT8375] [VT8233A] Savage8 AGP	Athlon Duron	SDRAM PC133 Reg SDRAM VC SDRAM DDR PC2100 Reg DDR	6 S 8 Reg	64Mbit 128Mbit 256Mbit 512Mbit	3GB S 4GB Reg	ECC	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KT-333 [VT8367] [VT8233A]	Athlon Duron	SDRAM PC133 Reg SDRAM VC SDRAM DDR PC2700 Reg DDR	6 S 8 Reg	64Mbit 128Mbit 256Mbit 512Mbit	3GB S 4GB Reg	ECC	1x 2x 4x	100 (x2) 133 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
VIA KT-333A [VT8367] [VT8235]	Athlon Duron	SDRAM PC133 Reg SDRAM DDR PC2700 Reg DDR	?	64Mbit 128Mbit 256Mbit 512Mbit	4GB	ECC	1x 2x 4x 8x	100 (x2) 133 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
VIA KT-400 [VT8368] [VT8235]	Athlon Duron	DDR PC3200	?	64Mbit 128Mbit 256Mbit 512Mbit	4GB	?	1x 2x 4x 8x	100 (x2) 133 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
VIA KT-400A [VT8377A] [VT8235]	Athlon Duron	DDR PC3200	?	64Mbit 128Mbit 256Mbit 512Mbit	4GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
~~VIA KM-333~~ [ ? ] [VT8235] Zoetrope AGP	Athlon Duron	SDRAM PC133 Reg SDRAM DDR PC2700 Reg DDR	?	?Mbit	?GB	ECC	1x 2x 4x 8x	100 (x2) 133 (x2)	1/3 1/4 Pseudosynch PCI 2.2	N/A
VIA KM-400 [VT8378] [VT8235] UniChrome AGP	Athlon Duron	DDR PC3200	?	?Mbit	?GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2)	1/3 1/4 1/5 Pseudosynch PCI 2.2	N/A
VIA KT-600 [ ? ] [VT8237]	Athlon Duron	DDR PC3200	?	?Mbit	4GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2) 200 (x2)	1/3 1/4 1/5 1/6 Pseudosynch PCI 2.2	N/A
VIA KT-880 [ ? ] [VT8237]	Athlon Duron	DDR DC PC3200	?	?Mbit	8GB	?	1x 2x 4x 8x	100 (x2) 133 (x2) 166 (x2) 200 (x2)	1/3 1/4 1/5 1/6 Pseudosynch PCI 2.2	N/A

Abbreviations:

K7 - AMD Athlon (and Athlon XP and Socket-A Semprons)
P5 - Original Pentium (60/66)
P54C - Pentium Classic (75~200)
P55C - Pentium MMX (split voltage)
P-Pro - Pentium Pro (P6)
P-Pro OD - Pentium Pro OverDrive (P6T)
P-III(T) - Tualatin Pentium III (different bus voltage than older P-IIIs. Chip is incompatible with older chipsets.)
P-III-S - 512KB Pentium III Tualatin (different electricals than P-III(T). Not intended to be used in desktop chipsets.)
Xeon - Larger cache versions of the Pentium II, Pentium III, or Pentium 4
FPM - Fast Page Mode
EDO - Extended Data Out (aka Hyper Page mode)
BEDO - Burst Extended Data Out
SDRAM - Synchronous DRAM (unbuffered)
Reg SDRAM - Registered SDRAM DIMM
SLDRAM - SyncLink DRAM
ESDRAM - Enhanced SDRAM
DDR PC2100 - PC2100 Double Data Rate SDRAM (unbuffered)
Reg DDR - Registered Double Data Rate SDRAM
RDR PC800 - PC800 Direct Rambus DRAM
RDR 4i - 4-bank Direct Rambus DRAM
RDR 32 - 32-bit Direct Rambus RIMM module (two 16-bit channels on a single RIMM module)
VC SDRAM - Virtual Channel SDRAM
HSDRAM - High speed SDRAM (lower latency and lower tAC PC133 SDRAM that runs up to ~150MHz). This isn't a different memory technology; it's souped-up PC133 SDRAM.
Single SIMM - Board supports a single 72-pin SIMM as one memory bank
Mem=3/4 Bus - Can run the RAM at 3/4 the speed of the System Bus
Mem=AGP - Can run the RAM at the speed of the AGP bus
DC - Dual Channel
QC - Quad Channel
FB - Fully Buffered DIMM
Lin Burst - Cyrix 6x86/6x86L/6x86MX/M-II Linear Burst feature
PCI 2.2 - Complies with PCI spec rev. 2.2.
PCI 66/64 - Supports a 66MHz or 64-bit or both PCI bus (which varies from chipset to chipset). Chipsets often implement this feature with add-on modules, not as a standard feature.
Unless otherwise noted, assume PCI 2.1 compliance.
AGP - Accelerated Graphics Port
- 0.8v and/or 1.5v - AGP buffers only operate at 0.8v or 1.5v levels; they are NOT 3.3v safe. This excludes some older AGP cards (like the 3dfx Voodoo series, Matrox G200, and Intel i740-based cards) from use in motherboards with this chipset. Quick rule of thumb: if your card supports AGP 4x mode, it should fit and operate in a 1.5v AGP slot.
SMA - Shared Memory Architecture (a bit different from UMA; basically an integrated AGP implementation)
UMA - Unified Memory Architecture (shared memory)

Notes:

The ECC/Parity column refers to whether or not the chipset supports error detection and correction for the system RAM. It doesn't indicate whether any onboard L2 has error detection. Also, any ECC function for the L2 cache on various sixth generation chips is handled exclusively by the CPU itself; the chipset doesn't deal with this. A 'Yes' in this column indicates there is some sort of error detection, but I'm not sure what flavor.
Many chipset features (such as the maximum amount of L2 cache or pseudo-synchronous operation) are not always implemented in all motherboards. Simply because a chipset supports a particular feature doesn't mean your motherboard necessarily has that feature.
The only bus speeds listed with each chipset are those that it officially supports. The Athlon, Willamette, Foster, and Merced chipsets all use a dual (2x) or quad-pumped (4x) bus that hits on the rising and falling edges of the clock, yielding a faster effective bus speed.
Running chipsets at odd bus speeds (75, 83, 112, 124MHz) can be hazardous to your system's overall stability. Most chipsets can only run PCI/AGP components as well as IDE channels synchronously, which forces the various buses to run outside their specifications when running at 75/83/112/124MHz. You won't physically damage the components by running them like this, but it can cause a system to behave erratically or even corrupt the occasional hard drive partition. Use with caution.
Although this page doesn't deal with 486 chipsets, beware of fake cache chips on 486 motherboards. Cache Check 7 can be helpful in determining what you have. Any chips with 'Write-Back' written on them are likely fake; write-back is a mode, not a type of SRAM chip.
The only difference between the Aladdin IV and the Aladdin IV+ is the chipset Southbridge.

Concerning the ALi Aladdin IV, IV+, V, and V+ chipsets:

The Aladdin IV and V chipsets may or may not be able to run in write-through mode. Personally, I don't think they can, but I really don't know. I'm assuming only write-back mode in the following paragraphs.

With 256KB of L2 present, the Aladdin IV and IV+ chipsets can use the 8Kx2 MESI cache line status bits for its modified and invalid bits, yielding 512MB cacheable with an 11-bit Tag. With 512KB of L2 cache present, the chipset can use the MESI bits if they are rearranged into 16Kx1 and one Tag bit is stolen for use as the invalid bit (like the Intel 430HX chipset does for its 512KB L2 cache), yielding 512MB cacheable with an 11-bit (effectively 10-bit) Tag. With 1MB of L2, the MESI probably can't be used at all, so two bits would need to be stolen from the TagRAM (leaving only 9 bits for address mapping), yielding 512MB cacheable in write-back mode. So, based on these assumptions:

Aladdin IV, IV+ L2 Cacheable Range
L2 Size		8-bit Tag	11-bit Tag	Assumptions
256KB	WB	128M	512M	Using 8Kx2 MESI.
512KB	WB	128M	512M	Using 16Kx1 MESI. One Tag bit stolen for invalid bit.
1MB	WB	128M	512M	No MESI. Two Tag bits stolen for invalid and modified bits.

The original Aladdin V chipset is interesting because its TagRAM is broken. If it were functioning, it would use a 16Kx10 SRAM for Tag store and 16Kx2 for MESI. With 256KB of L2, it supposedly can cache 1GB of RAM; but I have no idea how this works (you would need a 12-bit TagRAM along with the MESI bits). With 512KB, it can cache 512MB. For 1MB of L2, you would have to rearrange the MESI bits to 32Kx1 and steal an invalid bit from the Tag, yielding 512MB cacheable.

That's how it's supposed to work, but since it's broken, all revisions up through Revision 'E' of the Aladdin V chipset can only cache up to 128MB in write-back mode using an external 8-bit TagRAM with 512KB of L2 cache. The chipset uses its pair of MESI bits for the dirty and invalid bits.

Aladdin V, V+ (broken) L2 Cacheable Range
L2 Size		Cacheable	Assumptions
256KB	WB	64M	Disable internal TAG. Use internal 8Kx2 MESI and external 8Kx8 TAG. Yields 8 Tag bits.
256KB	WB	256M	Disable internal TAG. Use internal 8Kx2 MESI and external 8Kx10 TAG (or two 8Kx8 chips, using only the first two Tag bits of the second chip) leaving 10 bits for Tag.
512KB	WB	128M	Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx8 TAG. Yields 8 Tag bits.
512KB	WB	512M	Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx10 TAG (or two 16Kx8 chips, using only the first two Tag bits of the second chip) leaving 10 bits for Tag.
1MB	WB	128M	Disable internal TAG. 32Kx1 internal MESI used as dirty bit. One bit [7] is stolen from external 32Kx8 Tag chip for invalid bit, leaving 7 bits for Tag.
1MB	WB	512M	Disable internal TAG. 32Kx1 internal MESI used as dirty bit. One bit [9] is stolen from external 32Kx10 Tag chip (or two 32Kx8 chips, using only the first two Tag bits of the second chip) for invalid bit, leaving 9 bits for Tag.

Revision 'F' and later of the Aladdin V (M1542) fixes the internal Tag and can cache up to 512MB with either a 512KB or 1MB L2 and supposedly 1GB with 256KB.

Aladdin V+ (fixed) L2 Cacheable Range
L2 Size		Cacheable	Assumptions
256KB	WB	256M	Disable external TAGs. Use internal 8Kx2 MESI and internal 8Kx10 TAG. Yields 10 Tag bits.
256KB	WB	1GB	Use internal 8Kx2 MESI. Use internal 8Kx10 TAG [9:0] and first two bits from extended external TAG for Tag bits. Yields 12 Tag bits.
512KB	WB	128M	Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx8 TAG. Yields 8 Tag bits.
512KB	WB	512M	Disable external TAGs. Use internal 16Kx2 MESI and internal 16Kx10 TAG. Yields 10 Tag bits.
1MB	WB	128M	Disable internal TAG. Use internal 32Kx1 MESI for dirty bit. Use one external 32Kx8 chip as Tag. Steal one Tag bit from external TAG (bit [7]) for invalid bit. Yields 7 Tag bits.
1MB	WB	512M	Disable internal TAG. Use internal 32Kx1 MESI for dirty bit. Use both external 32Kx8 chips (or one 32Kx10) as Tag. Steal one Tag bit from extended external TAG (bit [9]) for invalid bit. Yields 9 Tag bits.
1MB	WB	4GB	Disable extended external 32Kx8 TAG (second external chip). Use 32Kx1 internal MESI and one internal Tag (bit [4]) for invalid and dirty bits. Use four bits from internal 32Kx10 TAG [3:0], and eight bits from external 32Kx8 TAG for Tag bits. Yields 12 Tag bits.

The Aladdin V+ adds an official 100MHz bus speed over the Aladdin V.
When run at 100MHz, only 6 SDRAM rows can be used in the Aladdin V+. Also, ECC does not function above 83MHz.
ALi changed its name to ULi.
nVidia bought ALi.

The AMD 640 chipset has various cacheing configurations. It can use the first seven Tag bits [6:0] of its 8-bit Tag as TagRAM with TA[7] acting as a modified bit in write-back mode. Or all 8 Tag bits can be used for addressability, each acting as its own modified line (this doubles the cacheable range in write-back mode, but is slower than if one bit were used exclusively as the modified (dirty) bit). This 8-bit scheme is the default setting for the chipset. A 9^th Tag bit can be used with a single exclusive modified bit for cacheing up to 998MB in WT mode or 510MB in WB. And a 10^th Tag bit is also available for cacheing up to 1998MB but, like the 8-bit Tag configuration, all Tags act as their own modified bits. The cacheable region is defined by the size of the L2 cache and which TagRAM scheme is used minus the size of the cache itself (no explanation is given in the datasheets, but because the 640 is based on a VIA chipset (the VP2/97), I believe it's the same as the VIA MVP3/MVP4 Invalid bit doohickey listed below). Of course since the chipset can only address 768MB of RAM, some of these cacheable limits are simply theoretical.

AMD 640 L2 Cacheable Range
L2 Size		8-bit Tag 1 modified	8-bit Tag All modified	9-bit Tag 1 modified	10-bit Tag All modified
512KB	WT	127.5M	127.5M	255.5M	511.5M
512KB	WB	63.5M	127.5M	127.5M	511.5M
1MB	WT	255M	255M	511M	1023M
1MB	WB	127M	255M	255M	1023M
2MB	WT	510M	510M	1022M	2046M
2MB	WB	254M	510M	510M	2046M

The Shuttle HOT-603 (the only motherboard that shipped with the 640 chipset), uses the 8-bit Tag w/ 1 modified scheme for its 1MB L2, yielding 255MB cacheable in WT mode and 127MB in WB.
AFAIK, the AMD 640AGP chipset was never released.
The AMD Athlon processor was initially demoed with the 751/755 chipset, but the 751 (Irongate) northbridge was actually released accompanied by the 756 (Viper) southbridge instead. This chipset pair was given the name 750.
The AMD 750 chipset may come bundled with the VIA VT82C686A southbridge rather than the default AMD 756 southbridge.
The AMD 760 chipset only runs its memory synchronously with the FSB, so to fully utilize PC2100 (266MHz) DDR-SDRAM, a 133MHz-based CPU must be used. If the FSB is set to run at 100MHz rather than 133MHz, "PC2100" DDR SDRAM will run at 200MHz effective (same as PC1600 DDR).
The AMD 760 chipset can come with either the AMD 766 southbridge or the VIA 686B southbridge. But in reality the 760 can only be found with the VIA 686B southbridge on available motherboards.
The AMD 760MP chipset can only utilize PCI-66 when using a PCI-66 compatible southbridge (this excludes the AMD 766 southbridge).
The AMD 762MP northbridge has specific incompatibilities with the VIA VT82C686B southbridge when write-snooping and when using ACPI suspend mode with Registered DIMMs. Note that the 762MP northbridge does not support unbuffered DIMMs; only Registered memory is supported.
The ATI S1-370 TL chipset may come with the ALi 1635D or 1543 southbridge.
The ATI IGP 320 chipset may come with the IXP 200 or the VIA VT82C686B southbridge.
The ATI IXP250 adds wake-on-LAN and DMI functionality over the IXP200.
AMD bought ATI.
The Intel 430LX has 9 Tag bits available (bits [27:19]) when 512KB of L2 cache is present and 10 Tag bits (bits [27:18]) when 256KB of cache is used. So both 256KB and 512KB L2 sizes cache the same amount of memory.
The Intel 430NX, 430FX, 430VX, 430HX, and 430TX chipsets do not support write-through mode for the L2 cache.
The Intel 430HX chipset uses one 8-bit wide TagRAM chip (bits [7:0]) for cacheing the bottom 64MB of system memory in write-back mode. When a second 8-bit wide TagRAM chip is installed into the second socket, the chipset can use the extended Tag addresses to cache up to 512MB of RAM in write-back mode. The extra 8-bit TagRAM only adds 3 Tag bits [10:8] to the addressable cache range. The 430HX can only address 512MB of memory anyway, so more Tag bits aren't needed.
The 430HX can support 0KB, 256KB, and 512KB of L2 cache. In the 256KB configuration, an external 8Kx8 SRAM is used along with the internal 8Kx2 MESI to cache up to 64MB. With 512KB present, a 16Kx8 external SRAM is used and the internal MESI is changed into a 16Kx1 configuration. You lose one bit (the invalid bit) from the MESI, so one bit from the Tag bits must be stolen for use as the invalid bit. Because it loses a Tag bit, this results in the 512KB L2 having the same cacheable range (64MB) as the 256KB configuration. If you were using the Extended 11-bit Tag mentioned above, then cacheable range for both L2 sizes would be 512MB instead of 64MB. This same cache 'twizzle' also appears to be implemented on the 430FX, 430VX, and 430TX chipsets (each mention that with 512KB, the external SRAM contains the Tag and valid bits).
Because the Intel 430VX chipset was one of the first to support SDRAM, many motherboards based on this chipset only support 2-clock SDRAM DIMMs (this also applies to some early 430TX boards). There are both 2-clock and 4-clock SDRAMs. The 'clock' determines the number of DRAM chips accessed each cycle. Contact your mobo manufacturer to determine which kind your motherboard supports. Although 4-clock SDRAM might work in a 2-clock board and, likewise, 2-clock SDRAM might work in a 4-clock mobo, the only way to tell is to try it. Most PC-66 SDRAM produced is of the 4-clock variety. All PC-100 and PC-133 SDRAM is 4-clock. Don't be surprised if it doesn't work in your motherboard. Another hang-up concerning the 430VX (as well as 430FX) chipset is the fact that it only supports 16Mbit DRAM densities. All SDRAM currently being produced is 64-Mbit or higher.
128Mbit DRAM is supported by the C-1 (and later) steppings of the 440BX chipset in certain configurations (16Mx8 organization). Documented support for Enhanced SDRAM in the 440BX was added in the Spec Update.
The 1/4 PCI clock divider on the Intel 440BX and 440ZX chipsets exists, but it's unofficial. But there is no 1/2 divider for AGP, so 133MHz may be quite iffy with an AGP video card. Not to mention that anything over 100MHz is overclocking anyway.
The Intel 810, 810e, 820, and 840 chipsets can *only* run its SDRAM system memory at 100MHz; therefore PC-100 (or faster) SDRAM is required even though the system bus itself actually can run at 66, 100, or 133MHz (depending on the chipset). Strange, but true. The i815 is the first Intel chipset to support PC133 SDRAM.
The Intel 810L chipset comes with I/O Control Hub 82801AB (ICH0). ICH0 supports ATA-33 and 4 PCI busmasters.
The Intel 810 chipset comes with I/O Control Hub 82801AA (ICH). ICH supports ATA-66 and 6 PCI busmasters.
The i810e and the DC100 version of the i810 chipset support 4MB of display cache for Z-buffer and come with the ICH controller hub, not ICH0.
The Intel 810 chipset has an erratum that prevents the SIMD instructions on the Pentium III chip from functioning; this was fixed with the 810E version of the chipset.
The ??? stepping of the 810e and 810e2 chipsets support the Pentium III Tualatin processor. The older ??? stepping does not.
The Intel 82802 FirmWare Hub comes as either a 4Mbit flash memory FWH (82802AB) or an 8Mbit flash memory FWH (82802AC).
The Intel 820 chipset supports D-RDRAM technologies in densities as high as 256Mbit, but SDRAM (via the MTH) is limited to 128Mbit. To achieve 1GB of memory with SDRAM on the i820, Registered SDRAM must be used. Note that SDRAM support has been removed from the 820 chipset because of reliability concerns.
The Intel i815e and i815ep differ from the i815 and i815p by what controller hub they use. The 'e' chipsets use ICH2 and the non-'e' chipsets use the older ICH.
The i815p and i815ep chipsets do not have integrated graphics controller.
The i815g and i815eg chipsets only have the integrated graphics controller and do not have an AGP slot.
The Intel 815 chipsets can support 3 double-sided DIMMs when running the RAM at 100MHz, but only 2 double-sided DIMMs when running it at 133MHz. In order to run the system memory at 133MHz, the front side bus must run at 133MHz. Conversely, you *can* run system memory at 100MHz with the FSB at 133MHz. Also, memory can be run at 100MHz (but not 133MHz) when using a 66MHz FSB.
The B-0 stepping of the 815, 815e, 815p, and 815ep chipsets support the Pentium III Tualatin processor. The older A-2 stepping does not.
The Intel ICH3 integrates the firmware hub.
The NVidia nForce chipsets differ by what AGP texturing (memory for graphics) configuration they use. Crush 11 uses a 64-bit SMA configuration, sharing main memory with the rest of the system. Crush 12 uses a dual channel DDR configuration (effectively 128-bit) with one channel (a separate dedicated DIMM) used for the onboard graphics memory. If an external AGP card is present the second memory channel can be utilized by the system instead. The same is true for the Crush 17 and 18 chipsets, respectively. Though it looks like Crush 17 got dropped from NVidia's lineup.
The nForce chipsets come both with and without a Dolby Digital 2.1 encoder (MCP-D comes with the encoder, MCP does not).
The nForce2 chipsets can come with either the more advanced MCP-T or a cut-down version, the MCP[2]. I've called it MCP[2] because it's a revised version of the MCP (with USB 2.0 and AC97). MCP[2] can also be combined with the older nForce northbridges (nForce 230 and 430) as can MCP-T (nForce 230-T and 430-T).
The OPTi Viper, Viper-N, Viper-N+, and ViperMax chipsets can either use Tag address 0 from the primary Tag chip for the dirty bit, leaving seven Tag bits (D[7:1]) for addressing (which halves the max cacheable in WB mode). Or use a 32Kx9 TagRAM chip, which includes a dedicated dirty bit (D[8]). Or use D[0] from a separate Tag chip as a dirty bit. The latter scheme disregards the seven other Tag bits (D[7:1]) on the secondary Tag chip. The Viper, Viper-N, Viper-N+, and ViperMax support up to 2MB of asynchronous cache or 512KB of synchronous cache.
The SiS 5571 originally was supposed to support up to 1MB of PB L2 cache, but the max is actually 512KB.
The SiS 5571, 5597/98, 5581/82, and 5591/92 chipsets have a separate internal dirty bit so the entire TagRAM can be used for address mapping in write-back mode.
The L2 cache on the SiS 5597/98, 5581/82, 5591/92, and 530 chipsets can only run in write-back mode (write-through can only be used for cache sizing).
The SiS 5597 differs from the SiS 5598 only in what form factor motherboard it is designed for. The SiS 5581/5582, SiS 5591/5592, VIA VP3 (597/597AT), and VIA MVP3 (598/598AT) also differ from each other only by what form factor board they are designed for.
The SiS 5591 chipset has a 100MHz bus, but only in the later revisions.
The SiS 530 and 620 chipsets may come with either the 5595 or 960 southbridge.
AFAIK, the SiS 621 chipset was never released. It was essentially replaced by the SiS 630.
The SiS 630S chipset differs from the 630E chipset in it allows for an AGP slot for video card upgrades; the 630E does not. And it supports VC SDRAM memory.
The SiS 741 chipset supports an external AGP slot in addition to its internal video chipset. The SiS 740 chipset does not have the external slot.

The VIA VP, VP2, VP2/97, VPX, VPX/97, and VP3 all seem to use the same cacheing scheme as the AMD 640 mentioned above (including subtracting the size of the L2 from the top of cacheable RAM to get the true cacheable range). Therefore:

VIA VP, VP2, VP2/97, VPX, VPX/97, VP3 L2 Cacheable Range
L2 Size		8-bit Tag 1 modified	8-bit Tag All modified	9-bit Tag 1 modified	10-bit Tag All modified
512KB	WT	127.5M	127.5M	255.5M	511.5M
512KB	WB	63.5M	127.5M	127.5M	511.5M
1MB	WT	255M	255M	511M	1023M
1MB	WB	127M	255M	255M	1023M
2MB	WT	510M	510M	1022M	2046M
2MB	WB	254M	510M	510M	2046M

BEDO support was removed from the VIA VP2 datasheet.
Any ECC capability was removed from the VIA VPX and VPX/97 chipsets.
Even though the VIA VP3 and Apollo Pro chipsets may claim to support DDR SDRAM, this support refers to an older specification of the memory type. These chipsets are not compatible with the current DDR spec.
Support for DDR-SDRAM, ESDRAM, and VC SDRAM was removed from the VIA MVP3 chipset specs.
Some motherboards may combine the VIA MVP3 northbridge with the 596A (or 596B) southbridge rather than the 586B southbridge.
The VIA MVP3 and MVP4 max out at 127.5MB cacheable when 512KB of L2 is present, 255MB cacheable with 1MB of L2, and 510MB cacheable with 2MB of L2 in write-through mode. The unusual cacheable ranges stem from the fact that the the top Tag address value (11111111, which would normally map an area the size of the L2 cache into RAM) is used as an invalid bit (there is no separate invalid bit within the chipset). Since this Tag address is lost, this area at the top of addressable RAM cannot be cached. So basically you figure out the cacheable RAM size according to the L2 size and 8-bit TagRAM and then subtract out the amount of L2 cache from the total cacheable area to get the actual cacheable amount. This also applies to write-back mode, but because one Tag bit is used as a dirty (modified) bit, the amount of cacheable RAM is half that of write-through, and then the L2 cache size is subtracted out to get the final cacheable range. See, this stuff is easy. ;-) Or in other words:
- VIA MVP3, MVP4
  L2 Cacheable Range
  
  L2 Size 8-bit Tag
  
  512KB WT 127.5M
  
  WB 63.5M
  
  1MB WT 255M
  
  WB 127M
  
  2MB WT 510M
  
  WB 254M
The VIA Apollo Pro133 and Pro133A chipsets may come with either the 596B or 686A southbridge.
While 8 memory banks (2GB max) are technically supported on the VIA Pro133, it is recommended that only 6 banks (1.5GB max) be used.
When using PC133 SDRAM on the VIA Pro133A chipset, only 6 banks may be used. All 8 may be used with PC100 SDRAM.
The VIA ProMedia with integrated Trident AGP was renamed to PM601 and was then renamed again to PLE133. And the PM-133 (with S3 AGP) used to be called the ProMedia-II.
The VIA PM-133 chipset allows an AGP slot in addition to the integrated graphics; the PL-133 does not have the AGP slot.
I'm not exactly sure what the differences between the VIA P4X-266A and P4X-266E are.
The VIA PT-600 and PT-800 were originally named the P4X-600 and P4X-800.
The VIA KX-133 does not support the Thunderbird or later Athlons because of different bus signal types.
The VIA KZ-133 chipset was renamed to KT-133.
The VIA KT-133E chipset supports the PowerNow! Features of the mobile Athlon/Duron CPUs, though it can still be found in desktop systems.
The VIA KM-133 chipset allows an AGP slot in addition to the integrated graphics; the KL-133 does not have the AGP slot.
The VIA KT-266A comes with memory performance enhancements over that of the KT-266.
The VIA KT-333 may be paired with the VT8233 or (on some boards) the VT8235.
The VIA KT-400A may be paired with the VT8235 or the VT8237.
The VIA Apollo Pro-266T, P4X-266, and P4X-266A all may come with the optional PCI-66/64 VPX controller.
While many Athlon-compatible VIA chipsets may claim support for ECC memory, they may not actually utilize the ECC functionality beyond the booting stage.

VIA MVP3, MVP4 L2 Cacheable Range
L2 Size		8-bit Tag
512KB	WT	127.5M
WB	63.5M
1MB	WT	255M
WB	127M
2MB	WT	510M
WB	254M

Renamed Chipsets:
PCChips HX Pro = ALi Aladdin III
PCChips SX Pro (M598) = SiS 530
PCChips TX AGP Pro (M577) = VIA MVP3
PCChips TX Pro (M560) = ALi Aladdin IV+
PCChips TX Pro (M575) = ALi Aladdin IV+
PCChips TX Pro II ( ? ) = SiS 5597/98
PCChips TX Pro III (M573) = VIA VP2
PCChips TX Pro IV (M570) = SiS 5591/92
PCChips Top Gun (M565) = ALi Aladdin IV+
PCChips VIA GRA (M858LMR) = VIA MVP4
PCChips VX Pro = VIA VP
PCChips VX Pro+ = VIA VPX
PCChips VX Two = SiS ???
PCChips M590 = SiS 530
PCChips BXToo (M760V) = VIA Apollo Pro
PCChips BXToo (M761V) = VIA Apollo Pro
PCChips BXToo (M767V) = VIA Apollo Pro+
PCChips BXPro (M747) = SiS 5600
PCChips BXCel (M726) = ALi Aladdin Pro II
PCChips BXCel (M729) = ALi Aladdin Pro II
PCChips BXTel (M730) = VIA Apollo Pro
PCChips Xcel 2000 (M741LMRT) = SiS 620
SOYO ETEQ 6618 = VIA VPX/97
SOYO ETEQ 6628 = VIA VP3
SOYO ETEQ 6638 = VIA MVP3

PC Chips actually goes by many names. PCChips = Ability = Alton = Amptron = Aristo = Asia Gate = Asiatech = Assa = Atrend = ECS = Elpina = Eurone = Fugu = Fugutech = Hi Sing = Houston = Hsing Tech = H Tech = Matsonic = Minstaple = PCWare = Pine = Protac = QDI = Warpspeed

South Bridge

ALi/ULi Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
M1533	Aladdin IV	133MB/s	ATA-33 33MB/s	PCI	1 host 2 ports 1.0a	N/A
M1543	Aladdin IV+ Aladdin V Aladdin V+ Aladdin Pro II	133MB/s	ATA-66 66MB/s	PCI	1 host 3 ports 1.0a	N/A
M1535D	Aladdin TNT2 Aladdin Pro 4 ATI S1-370TL	133MB/s	ATA-66 66MB/s	PCI	1 hosts 4 ports 1.0a	AC97 2.1
M1535D+	CyberAladdin CyberAladdin-T Aladdin Pro 5 Aladdin Pro 5T	133MB/s	ATA-100 100MB/s	PCI	2 hosts 6 ports 1.0a	AC97 2.1
M1563	Aladdin M1667 M1681 M1683 M1687 M1688	Hypertransport 800MB/s	ATA-133 133MB/s	PCI	4 hosts 6 ports 2.0	AC97 2.1	10/100 Ethernet
AMD Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
756	751	133MB/s	ATA-66 66MB/s	PCI	1 host 4 ports 1.0	N/A
766	~~760~~ 760MP	133MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 5 devices	1 host 4 ports 1.0	N/A
768	760MPX	266MB/s	ATA-100 100MB/s	PCI-66/64 66MHz PCI 2.2 33MHz 8 devices	1 host 4 ports 1.1	AC97
ATI Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
IXP 200	IGP 320 IGP 330 IGP 340 Radeon 9100 IGP	133MB/s	ATA-100 100MB/s	PCI ? ?MHz ? devices	? hosts 6 ports 2.0	AC97	10/100 Ethernet
IXP 210	?	133MB/s	ATA-100 100MB/s	PCI ? ?MHz ? devices	? hosts 6 ports 2.0	AC97	10/100 Ethernet
Intel Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
82371SB (PIIX3)	430HX 430VX 440FX	133MB/s	PIO-4 16MB/s	PCI 2.1	1 host 2 ports 1.0	N/A
82371AB (PIIX4) 82371EB (PIIX4E)	430TX 440BX 440EX 440LX 440ZX	133MB/s	ATA-33 33MB/s	PCI 2.1 33MHz	1 host 2 ports 1.1	N/A
82801AA (ICH)	810 810-DC100 810e-DC133 815 815g 815p 820 840	Hub 266MB/s	ATA-66 66MB/s	PCI 2.2 33MHz 6 devices	1 host 2 ports 1.1	AC97 2.1
82801AB (ICH0)	810L	Hub 266MB/s	ATA-33 33MB/s	PCI 2.2 33MHz 4 devices	1 host 2 ports 1.1	AC97 2.1
82801BA (ICH2)	810e2-DC133 815e 815ep 820e 845 845B 850 850E 860	Hub 266MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 4 ports 1.1	AC97 2.1
82801CA (ICH3)	830MG 830MP E7500 E7501	Hub 266MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	3 hosts 6 ports 1.1	AC97 2.2	10/100 Ethernet
NVidia Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
MCP	nForce220 nForce420	Hypertransport 800MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	N/A	10/100 Ethernet
MCP-D	nForce220D nForce420D nForce420D nForce615D nForce620D	Hypertransport 800MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	DD2.1 APU	10/100 Ethernet
MCP-T	nForce2-GT IGP nForce2-ST SPP nForce230-T nForce430-T nForce2 Ultra 400	Hypertransport 800MB/s	ATA-133 133MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 2.0	DD5.1 APU	10/100 Ethernet IEEE 1394A
MCP[2]	nForce230 nForce430 nForce615D nForce620D nForce2-G IGP nForce2-S SPP nForce2 400	Hypertransport 800MB/s	ATA-133 133MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 2.0	AC97	10/100 Ethernet
SiS Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
630 630E	630 630E	133MB/s	ATA-66 66MB/s	PCI 2.2 33MHz 4 devices	2 hosts 5 ports ?	AC97	10/100 Ethernet
630S 630ST	630S 630ST	133MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 4 devices	2 hosts 6 ports ?	AC97	10/100 Ethernet
633 633T	633 633T	MuTIOL 1066MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	AC97
635 635T	635 635T	MuTIOL 1066MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	AC97	10/100 Ethernet
730S	730S	133MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 4 devices	2 hosts 6 ports ?	AC97	10/100 Ethernet
733	733	MuTIOL 1200MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports ?	AC97
735	735	MuTIOL 1200MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports ?	AC97	10/100 Ethernet
745	745	MuTIOL 1200MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports ?	AC97 2.1	10/100 Ethernet IEEE 1394
961	640T 645 646 650 740 750	MuTIOL 533MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	AC97 2.2	10/100 Ethernet
961B	645DX	MuTIOL 533MB/s	ATA-133 133MB/s	PCI 2.2 33MHz 6 devices	2 hosts 6 ports 1.1	AC97 2.2	10/100 Ethernet
VIA Southbridge	North Bridges	Northbridge Connection	ATA (UDMA)	PCI	USB	Audio	Other
586	Apollo VP	133MB/s	ATA-33 33MB/s	PCI 2.1 33MHz ? devices	1 host 2 ports 1.0	N/A
586A	VP2 VPX	133MB/s	ATA-33 33MB/s	PCI 2.1 33MHz ? devices	1 host 2 ports 1.0	N/A
586B	Apollo Pro VP2/97 VPX/97 VP3	133MB/s	ATA-33 33MB/s	PCI 2.1 33MHz 5 devices	1 host 2 ports 1.0	N/A
596A	Apollo Pro+ MVP3	133MB/s	ATA-33 33MB/s	PCI 2.1 33MHz 5 devices	1 host 2 ports 1.0	N/A
596B	Apollo Pro133 Apollo Pro133A Apollo Pro133T MVP3	133MB/s	ATA-33 33MB/s	PCI 2.2 33MHz 5 devices	1 host 2 ports 1.0	N/A
686A	AMD 750 Apollo Pro133 Apollo Pro133A KT-133 KT-133A KX-133 MVP4	133MB/s	ATA-66 66MB/s	PCI 2.2 33MHz 5 devices	1 host 4 ports 1.1	AC97 2.0
686B	AMD 760 ATI IGP 320 KL-133 KL-133A KLE133 KT-133E	133MB/s	ATA-66 66MB/s	PCI 2.2 33MHz 5 devices	1 host 4 ports 1.1	AC97 2.0
8231	KM-133 PL-133 PL-133T PLE133 (PM601) PLE133T PM-133	133MB/s	ATA-100 100MB/s	PCI 2.1 33MHz 5 devices	2 hosts 4 ports ?	AC97	10/100 Ethernet
8233	Apollo Pro266 Apollo Pro266T KT-266 KT-266A P4M-266 P4M-266A P4X-266 P4X-266A	Vlink 266MB/s	ATA-100 100MB/s	PCI 2.2 33MHz 5 devices	2 hosts 4 ports 1.1	AC97 2.1	10/100 Ethernet
8233A 8233C	KM-266 KT-266DP KT-333 P4X-266E	Vlink 266MB/s	ATA-133 133MB/s	PCI 2.2 33MHz 5 devices	2 hosts 4 ports 1.1	AC97 2.1	10/100 Ethernet
8235	KM-400 KT-333 KT-333A KT-400 KT-400A KT-600 P4M-333 P4X-333 P4X-400 P4X-400A PT-600	Vlink 533MB/s	ATA-133 133MB/s	PCI 2.1 33MHz 5 devices	3 hosts 6 ports 2.0	AC97	10/100 Ethernet
8237	K8T-400M K8T-800 KM-400 KT-400A KT-600 PT-800	Vlink 533MB/s	ATA-133 133MB/s Serial ATA-1 150MB/s Raid 0,1	PCI 2.2 33MHz 6 devices	? hosts 8 ports 2.0	AC97 VIA 7.1	10/100 Ethernet
8237	K8T-800 Pro KT-880 K8T-890 PT-880 PT-880 Pro PT-894 PT-894 Pro	Ultra Vlink 1066MB/s	ATA-133 133MB/s Serial ATA-1 150MB/s Raid 0,1	PCI 2.2 33MHz 6 devices	? hosts 8 ports 2.0	AC97 VIA 7.1	10/100 Ethernet
VPX	Apollo Pro266T K8M-800 K8T-800 K8T-800 Pro P4X-266 P4X-266A	Vlink 533MB/s	N/A	PCI 66/64 66MHz PCI ? 33MHz 12 devices	N/A	N/A

The following table lists the maximum theoretical bandwidth available from the various types of DRAM. It does not necessarily imply that the system can actually utilize the maximum bandwidths listed.

DRAM Type	Name	Base Memory Speed	DDR/ QDR	Bus Width (bits)	Bits per Byte	Single Channel Theoretical Bandwidth	Dual Channel Theoretical Bandwidth	Quad Channel Theoretical Bandwidth
SDRAM	PC66	66MHz	--	64	8	533MB/s	1066MB/s	2133MB/s
	PC100	100MHz	--	64	8	800MB/s	1600MB/s	3200MB/s
	PC133	133MHz	--	64	8	1066MB/s	2133MB/s	4266MB/s
	"PC150"	150MHz	--	64	8	1200MB/s	2400MB/s	4800MB/s

DDR SDRAM	PC1600 (DDR200)	100MHz	x2	64	8	1600MB/s	3200MB/s	6400MB/s
	PC2100 (DDR266)	133MHz	x2	64	8	2133MB/s	4266MB/s	8533MB/s
	"PC2400"	150MHz	x2	64	8	2400MB/s	4800MB/s	9600MB/s
	PC2700 (DDR333)	166MHz	x2	64	8	2666MB/s	5333MB/s	10666MB/s
	PC3200 (DDR400)	200MHz	x2	64	8	3200MB/s	6400MB/s	12800MB/s

QDR SDRAM	PC1600 (QDR400)	100MHz	x4	64	8	3200MB/s	6400MB/s
	PC2100 (QDR533)	133MHz	x4	64	8	4266MB/s	8533MB/s
	~~PC2700~~ (QDR667)	166MHz	x4	64	8	5333MB/s	10666MB/s

DDR-2 SDRAM	PC3200 (DDR2-400)	200MHz	x2	64	8	3200MB/s	6400MB/s	12800MB/s
	PC4300 (DDR2-533)	266MHz	x2	64	8	4266MB/s	8533MB/s	16466MB/s
	PC5400 (DDR2-667)	333MHz	x2	64	8	5333MB/s	10666MB/s	21333MB/s
	PC5800 (DDR2-733)	366MHz	x2	64	8	5800MB/s	11700MB/s	23400MB/s
	PC6400 (DDR2-800)	400MHz	x2	64	8	6400MB/s	12800MB/s	25600MB/s
	PC8500 (DDR2-1066)	533MHz	x2	64	8	8533MB/s	17066MB/s	34133MB/s
	PC9600 (DDR2-1200)	600MHz	x2	64	8	9600MB/s	19200MB/s	38400MB/s

DDR-3 SDRAM	PC6400 (DDR3-800)	400MHz	x2	64	8	6400MB/s	12800MB/s	25600MB/s
	PC8500 (DDR3-1066)	533MHz	x2	64	8	8533MB/s	17066MB/s	34133MB/s
	PC12800 (DDR3-1600)	800MHz	x2	64	8	12800MB/s	25600MB/s	51200MB/s

Rambus	PC600	266MHz	x2	16	8	1066MB/s	2133MB/s
	PC600	300MHz	x2	16	8	1200MB/s	2400MB/s
	PC700	300MHz	x2	16	8	1200MB/s	2400MB/s
	PC700	356MHz	x2	16	8	1424MB/s	2848MB/s
	PC800	400MHz	x2	16	8	1600MB/s	3200MB/s

Rambus Hastings	PC1066	533MHz	x2	16	8		4266MB/s
Rambus Hastings	~~PC1200~~	600MHz	x2	16	8		4800MB/s

Rambus "32-bit" modules	PC1066	533MHz	x2	16	8		4266MB/s
Rambus "32-bit" modules	~~PC1200~~	600MHz	x2	16	8		4800MB/s

Rambus "64-bit" modules	~~PC1066~~	533MHz	x2	16	8			8533MB/s
Rambus "64-bit" modules	PC1200	600MHz	x2	16	8			9600MB/s

"PC150" and "PC2400" are not recognized specifications; they're just overclocked PC133 SDRAM and PC2100 DDR.

QDR SDRAM is not a different type of memory. It is standard DDR SDRAM that is utilized by the chipset as a double-sided memory stick where each DIMM bank (side) can be accessed almost simultaneously. This obviously will only work with double-sided DIMMs and requires a specially designed DIMM to deal with the signalling.

When used with a 133MHz FSB (front side bus) PC600 Rambus only operates at 266MHz base clock. When used with a 100MHz FSB PC700 only runs at 300MHz base clock. PC800 can operate at 400MHz regardless of the speed (100 or 133MHz) of the FSB. PC700 is only supported on the i820 chipset.

Rambus 32-bit RIMMs are effectively 32-bits wide, but in reality two 16-bit wide channels are contained on one module, so the chipset still sees it as dual channel. The same is true for 64-bit modules; they use four 16-bit channels on a single module.

The following table presents a *generalized* view of what the L2 cacheability range is for various direct-mapped L2 and Tag bit configurations. The table reflects the assumption that the dirty bit that is needed in write-back mode must come from the TagRAM bits, and is not a separate bit within the chipset itself. Not all chipsets necessarily follow this assumption. And if the chipset does have a separate dirty bit, then the amount of memory that can be cached in write-back mode is the same as write-through.

Cacheable Memory Range (Direct-Mapped only)
		Tag Bits
L2 Size		6	7	8	9	10	11	12	13	14	15	16	17	18	19
64KB	WT	4M	8M	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G
64KB	WB	2M	4M	8M	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G
128KB	WT	8M	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G
128KB	WB	4M	8M	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G
256KB	WT	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G
256KB	WB	8M	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G
512KB	WT	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G	256G
512KB	WB	16M	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G
1MB	WT	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G	256G	512G
1MB	WB	32M	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G	256G
2MB	WT	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G	256G	512G	1T
2MB	WB	64M	128M	256M	512M	1G	2G	4G	8G	16G	32G	64G	128G	256G	512G

In write-through mode the amount of memory that can be cached (addressed) by the L2 cache SRAM is dependent on the amount of L2 cache and the width of the TagRAM. For direct-mapped caches, the size of the L2 cache is one cache page. The Tag bits define the number of memory addresses the cache-size pages can be mapped to. So if you have 512KB of L2 cache and a 7-bit Tag width, the cache page is 512KB and the number of unique addresses that can be defined by the Tag is 128 {2⁷ = 128}. This translates into 64MB cacheable in write-through mode {512KB * 128}. An 8-bit Tag can define 256 addresses, and so with 512KB can cache 128MB of RAM. Every additional Tag bit that is added effectively doubles the amount of cacheable memory.

In write-back mode, you must use one of the Tag bits as a modified (dirty) bit, so the amount of addressable memory is reduced by half. That same 512KB of cache with the 8 bits of TagRAM (actually 7 Tag bits and 1 dirty bit) can only address 64 megabytes of main memory in write-back mode {512KB * 2⁷ = 64MB}, half that of write-through mode.

This does *not* apply to the 2-way, 4-way, or 8-way set associative caches found on various 6^th generation processors; only to direct-mapped cache. For direct-mapped caches, the Tag addresses map an entire cache page to memory; for set-associative, the Tags map cache sets (two, four, or eight cache lines, depending on the associativity).

Note that the math here is just quick and dirty. For a much better explanation of how this works, see The PC Guide, Caches and Their Design, and section 2.27 of the CSIPHC FAQ.

The following table is a list of the L2 cacheable ranges for various 6^th generation processors that have L2 cache built onto the chip, die, or substrate. All cacheability issues are handled by an on-Chip TagRAM; the motherboard's chipset does not deal with the cacheable range for this L2 at all. All caches are in write-back mode (a separate pair of MESI bits is used to determine the cache state: Modified, Exclusive, Shared, or Invalid).

Chip       Codename    Voltage  Stepping  L2 Cache Range
P-II  233   Klamath     2.8/3.3  6-3-3     512MB
P-II  233   Klamath     2.8/3.3  6-3-4     512MB
P-II  266   Klamath     2.8/3.3  6-3-3     512MB
P-II  266   Klamath     2.8/3.3  6-3-4     512MB
P-II  266   Deschutes   2.0/3.3  6-5-0     512MB
P-II  266   Deschutes   2.0/3.3  6-5-2     4GB
P-II  300   Klamath     2.8/3.3  6-3-3     512MB
P-II  300   Klamath     2.8/3.3  6-3-4     512MB
P-II  300   Deschutes   2.0/3.3  6-5-2     4GB
P-II  333   Deschutes   2.0/3.3  6-5-0     512MB
P-II  333   Deschutes   2.0/3.3  6-5-1     4GB
P-II  333   Deschutes   2.0/3.3  6-5-2     4GB
P-II  350   Deschutes   2.0/3.3  6-5-1     4GB
P-II  350   Deschutes   2.0/3.3  6-5-2     4GB
P-II  350   Deschutes   2.0/3.3  6-5-3     4GB
P-II  400   Deschutes   2.0/3.3  6-5-1     4GB
P-II  400   Deschutes   2.0/3.3  6-5-2     4GB
P-II  400   Deschutes   2.0/3.3  6-5-3     4GB
P-II  450   Deschutes   2.0/3.3  6-5-2     4GB

P-3   450   Katmai      2.0/3.3  6-7-2     4GB
P-3   450   Katmai      2.0/3.3  6-7-3     4GB
P-3   500   Katmai      2.0/3.3  6-7-2     4GB
P-3   500   Katmai      2.0/3.3  6-7-3     4GB
P-3   500E  Cumine PGA  1.6      6-8-1     4GB
P-3   500E  Cumine PGA  1.65     6-8-3     4GB
P-3   533B  Katmai      2.0/3.3  6-7-3     4GB
P-3   533EB Coppermine  1.65     6-8-1     4GB
P-3   533EB Coppermine  1.65     6-8-3     4GB
P-3   533EB Cumine PGA  1.65     6-8-1     4GB
P-3   533EB Cumine PGA  1.65     6-8-3     4GB
P-3   550   Katmai      2.0/3.3  6-7-3     4GB
P-3   550E  Coppermine  1.65     6-8-1     4GB
P-3   550E  Coppermine  1.65     6-8-3     4GB
P-3   550E  Cumine PGA  1.6      6-8-1     4GB
P-3   550E  Cumine PGA  1.65     6-8-3     4GB
P-3   550E  Cumine PGA  1.7      6-8-6     4GB
P-3   600   Katmai      2.05/3.3 6-7-3     4GB
P-3   600B  Katmai      2.05/3.3 6-7-3     4GB
P-3   600E  Coppermine  1.65     6-8-1     4GB
P-3   600E  Coppermine  1.65     6-8-3     4GB
P-3   600E  Coppermine  1.65     6-8-6     4GB
P-3   600E  Cumine PGA  1.65     6-8-1     4GB
P-3   600E  Cumine PGA  1.65     6-8-3     4GB
P-3   600E  Cumine PGA  1.7      6-8-6     4GB
P-3   600E  Cumine PGA  1.75     6-8-A     4GB
P-3   600EB Coppermine  1.65     6-8-1     4GB
P-3   600EB Coppermine  1.65     6-8-3     4GB
P-3   600EB Coppermine  1.65     6-8-6     4GB
P-3   600EB Cumine PGA  1.65     6-8-1     4GB
P-3   600EB Cumine PGA  1.65     6-8-3     4GB
P-3   600EB Cumine PGA  1.7      6-8-6     4GB
P-3   650   Coppermine  1.65     6-8-1     4GB
P-3   650   Coppermine  1.65     6-8-3     4GB
P-3   650   Coppermine  1.65     6-8-6     4GB
P-3   650   Cumine PGA  1.65     6-8-1     4GB
P-3   650   Cumine PGA  1.65     6-8-3     4GB
P-3   650   Cumine PGA  1.7      6-8-6     4GB
P-3   667   Coppermine  1.65     6-8-1     4GB
P-3   667   Coppermine  1.65     6-8-3     4GB
P-3   667   Coppermine  1.65     6-8-6     4GB
P-3   667   Cumine PGA  1.65     6-8-1     4GB
P-3   667   Cumine PGA  1.65     6-8-3     4GB
P-3   667   Cumine PGA  1.7      6-8-6     4GB
P-3   700   Coppermine  1.65     6-8-1     4GB
P-3   700   Coppermine  1.65     6-8-3     4GB
P-3   700   Coppermine  1.65     6-8-6     4GB
P-3   700   Cumine PGA  1.65     6-8-1     4GB
P-3   700   Cumine PGA  1.65     6-8-3     4GB
P-3   700   Cumine PGA  1.7      6-8-6     4GB
P-3   700   Cumine PGA  1.75     6-8-A     4GB
P-3   733   Coppermine  1.65     6-8-1     4GB
P-3   733   Coppermine  1.65     6-8-3     4GB
P-3   733   Coppermine  1.65     6-8-6     4GB
P-3   733   Cumine PGA  1.65     6-8-1     4GB
P-3   733   Cumine PGA  1.65     6-8-3     4GB
P-3   733   Cumine PGA  1.7      6-8-6     4GB
P-3   733   Cumine PGA  1.75     6-8-A     4GB
P-3   750   Coppermine  1.65     6-8-1     4GB
P-3   750   Coppermine  1.65     6-8-3     4GB
P-3   750   Coppermine  1.65     6-8-6     4GB
P-3   750   Cumine PGA  1.65     6-8-1     4GB
P-3   750   Cumine PGA  1.65     6-8-3     4GB
P-3   750   Cumine PGA  1.7      6-8-6     4GB
P-3   750   Cumine PGA  1.75     6-8-A     4GB
P-3   800   Coppermine  1.65     6-8-1     4GB
P-3   800   Coppermine  1.65     6-8-3     4GB
P-3   800   Coppermine  1.65     6-8-6     4GB
P-3   800E  Cumine PGA  1.65     6-8-1     4GB
P-3   800E  Cumine PGA  1.65     6-8-3     4GB
P-3   800E  Cumine PGA  1.7      6-8-6     4GB
P-3   800E  Cumine PGA  1.75     6-8-A     4GB
P-3   800EB Coppermine  1.65     6-8-1     4GB
P-3   800EB Coppermine  1.65     6-8-3     4GB
P-3   800EB Coppermine  1.65     6-8-6     4GB
P-3   800EB Cumine PGA  1.65     6-8-1     4GB
P-3   800EB Cumine PGA  1.65     6-8-3     4GB
P-3   800EB Cumine PGA  1.7      6-8-6     4GB
P-3   800EB Cumine PGA  1.75     6-8-A     4GB
P-3   850   Coppermine  1.65     6-8-3     4GB
P-3   850   Coppermine  1.65     6-8-6     4GB
P-3   850   Cumine PGA  1.65     6-8-3     4GB
P-3   850   Cumine PGA  1.7      6-8-6     4GB
P-3   850   Cumine PGA  1.75     6-8-A     4GB
P-3   866   Coppermine  1.65     6-8-3     4GB
P-3   866   Coppermine  1.65     6-8-6     4GB
P-3   866   Cumine PGA  1.65     6-8-3     4GB
P-3   866   Cumine PGA  1.7      6-8-6     4GB
P-3   866   Cumine PGA  1.75     6-8-A     4GB
P-3   866   Cumine-T    1.75     6-8-A     4GB
P-3   933   Coppermine  1.7      6-8-3     4GB
P-3   933   Coppermine  1.7      6-8-6     4GB
P-3   933   Cumine PGA  1.65     6-8-3     4GB
P-3   933   Cumine PGA  1.7      6-8-6     4GB
P-3   933   Cumine PGA  1.75     6-8-A     4GB
P-3   933   Cumine-T    1.75     6-8-A     4GB
P-3   1.0   Coppermine  1.7      6-8-6     4GB
P-3   1.0   Cumine PGA  1.75     6-8-A     4GB
P-3   1.0B  Coppermine  1.7      6-8-3     4GB
P-3   1.0B  Cumine PGA  1.7      6-8-3     4GB
P-3   1.0B  Cumine PGA  1.7      6-8-6     4GB
P-3   1.0B  Cumine PGA  1.76     6-8-6     4GB
P-3   1.0B  Cumine PGA  1.75     6-8-A     4GB
P-3   1.0B  Cumine-T    1.75     6-8-A     4GB
P-3   1.10  Cumine PGA  1.75     6-8-A     4GB
P-3   1.13  Coppermine  1.8      6-8-6     4GB
P-3   1.13  Cumine PGA  1.75     6-8-A     4GB
P-3   1.13  Cumine-T    1.75     6-8-A     4GB
P-3   1.0B  Tualatin256 1.475    6-B-1     64GB
P-3   1.13A Tualatin256 1.475    6-B-1     64GB
P-3   1.13A Tualatin256 1.5      6-B-4     64GB
P-3   1.2   Tualatin256 1.475    6-B-1     64GB
P-3   1.2   Tualatin256 1.5      6-B-4     64GB
P-3   1.33  Tualatin256 1.5      6-B-1     64GB
P-3   1.4   Tualatin256 1.5      6-B-1     64GB
P-3   1.4   Tualatin256 1.5      6-B-4     64GB
P-3-S 700   Tualatin512 1.1      6-B-x     64GB
P-3-S 1.13  Tualatin512 1.45     6-B-1     64GB
P-3-S 1.13  Tualatin512 1.45     6-B-4     64GB
P-3-S 1.26  Tualatin512 1.45     6-B-1     64GB
P-3-S 1.26  Tualatin512 1.45     6-B-4     64GB
P-3-S 1.4   Tualatin512 1.45     6-B-1     64GB
P-3-S 1.4   Tualatin512 1.45     6-B-4     64GB

Cel   266   Covington   2.0      6-5-0     N/A
Cel   266   Covington   2.0      6-5-1     N/A
Cel   266   Covington   2.0      6-5-2     N/A
Cel   300   Covington   2.0      6-5-0     N/A
Cel   300   Covington   2.0      6-5-1     N/A
Cel   300   Covington   2.0      6-5-2     N/A
Cel   300A  Mendocino   2.0      6-6-0     4GB
Cel   300A  Mendocino   2.0      6-6-5     4GB
Cel   333   Mendocino   2.0      6-6-0     4GB
Cel   333   Mendocino   2.0      6-6-5     4GB
Cel   366   Mendocino   2.0      6-6-0     4GB
Cel   366   Mendocino   2.0      6-6-5     4GB
Cel   400   Mendocino   2.0      6-6-0     4GB
Cel   400   Mendocino   2.0      6-6-5     4GB
Cel   433   Mendocino   2.0      6-6-0     4GB
Cel   433   Mendocino   2.0      6-6-5     4GB
Cel   466   Mendocino   2.0      6-6-5     4GB
Cel   500   Mendocino   2.0      6-6-5     4GB
Cel   500A  Cumine-128  1.5      6-8-3     4GB
Cel   533   Mendocino   2.0      6-6-5     4GB
Cel   500A  Cumine-128  1.5      6-8-3     4GB
Cel   533A  Cumine-128  1.5      6-8-3     4GB
Cel   533A  Cumine-128  1.7      6-8-6     4GB
Cel   566   Cumine-128  1.5      6-8-3     4GB
Cel   566   Cumine-128  1.7      6-8-6     4GB
Cel   566   Cumine-128  1.75     6-8-A     4GB
Cel   600   Cumine-128  1.5      6-8-3     4GB
Cel   600   Cumine-128  1.7      6-8-6     4GB
Cel   600   Cumine-128  1.75     6-8-A     4GB
Cel   633   Cumine-128  1.65     6-8-3     4GB
Cel   633   Cumine-128  1.7      6-8-6     4GB
Cel   633   Cumine-128  1.75     6-8-A     4GB
Cel   667   Cumine-128  1.65     6-8-3     4GB
Cel   667   Cumine-128  1.7      6-8-6     4GB
Cel   667   Cumine-128  1.75     6-8-A     4GB
Cel   700   Cumine-128  1.65     6-8-3     4GB
Cel   700   Cumine-128  1.7      6-8-6     4GB
Cel   700   Cumine-128  1.75     6-8-A     4GB
Cel   733   Cumine-128  1.65     6-8-3     4GB
Cel   733   Cumine-128  1.7      6-8-6     4GB
Cel   733   Cumine-128  1.75     6-8-A     4GB
Cel   766   Cumine-128  1.65     6-8-3     4GB
Cel   766   Cumine-128  1.7      6-8-6     4GB
Cel   766   Cumine-128  1.75     6-8-A     4GB
Cel   800   Cumine-128  1.65     6-8-3     4GB
Cel   800   Cumine-128  1.7      6-8-6     4GB
Cel   800   Cumine-128  1.75     6-8-A     4GB
Cel   850   Cumine-128  1.65     6-8-3     4GB
Cel   850   Cumine-128  1.7      6-8-6     4GB
Cel   850   Cumine-128  1.75     6-8-A     4GB
Cel   900   Cumine-128  1.75     6-8-A     4GB
Cel   900A  Tualatin    1.475    6-B-1     4GB
Cel   950   Cumine-128  1.75     6-8-A     4GB
Cel   1.0G  Cumine-128  1.75     6-8-A     4GB
Cel   1.1G  Cumine-128  1.75     6-8-A     4GB
Cel   1.0A  Tualatin    1.475    6-B-1     4GB
Cel   1.0A  Tualatin    1.5      6-B-4     4GB
Cel   1.1A  Tualatin    1.475    6-B-1     4GB
Cel   1.1A  Tualatin    1.5      6-B-4     4GB
Cel   1.2G  Tualatin    1.475    6-B-1     4GB
Cel   1.2G  Tualatin    1.5      6-B-1     4GB
Cel   1.2G  Tualatin    1.5      6-B-4     4GB
Cel   1.3G  Tualatin    1.5      6-B-1     4GB
Cel   1.3G  Tualatin    1.5      6-B-4     4GB
Cel   1.4G  Tualatin    1.5      6-B-1     4GB
Cel   1.4G  Tualatin    1.5      6-B-4     4GB

PPro  all   P6          various  6-1-x     64GB
P-II  ODP   P6T         2.0/2.5  6-3-2     64GB

Xeon  400   Drake       2.0/2.5  6-5-2     64GB
Xeon  400   Drake       2.0/2.5  6-5-3     64GB
Xeon  450   Drake       2.0/2.7  6-5-3     64GB
Xeon  500   Tanner      2.0/2.7  6-7-2     64GB
Xeon  500   Tanner      2.0/2.7  6-7-3     64GB
Xeon  550   Tanner      2.0/2.0  6-7-3     64GB
Xeon  600   Cascades    various  6-8-1     64GB
Xeon  600   Cascades    various  6-8-3     64GB
Xeon  667   Cascades    various  6-8-1     64GB
Xeon  667   Cascades    various  6-8-3     64GB
Xeon  700   Cascades    various  6-A-x     64GB
Xeon  700   Cascades    various  6-A-4     64GB
Xeon  733   Cascades    various  6-8-1     64GB
Xeon  733   Cascades    various  6-8-3     64GB
Xeon  733   Cascades    various  6-8-6     64GB
Xeon  800   Cascades    various  6-8-1     64GB
Xeon  800   Cascades    various  6-8-3     64GB
Xeon  800   Cascades    various  6-8-6     64GB
Xeon  866   Cascades    various  6-8-3     64GB
Xeon  866   Cascades    various  6-8-6     64GB
Xeon  900   Cascades    various  6-A-4     64GB
Xeon  933   Cascades    various  6-8-3     64GB
Xeon  933   Cascades    various  6-8-6     64GB
Xeon  1.0B  Cascades    various  6-8-6     64GB

K6-3  400   Sharptooth  2.4/3.3  5-9-x     4GB
K6-3  450   Sharptooth  2.4/3.3  5-9-x     4GB
K6-2+ 450   ?           2.0/3.3  5-D-x     4GB
K6-2+ 475   ?           2.0/3.3  5-D-x     4GB
K6-2+ 500   ?           2.0/3.3  5-D-x     4GB
K6-3+ 450   ?           2.0/3.3  5-D-x     4GB
K6-3+ 475   ?           2.0/3.3  5-D-x     4GB
K6-3+ 500   ?           2.0/3.3  5-D-x     4GB

Athl  500   K7          1.6/3.3  6-1-x     64GB
Athl  550   K7          1.6/3.3  6-1-x     64GB
Athl  550   K75         1.6/3.3  6-2-x     64GB
Athl  600   K7          1.6/3.3  6-1-x     64GB
Athl  600   K75         1.6/3.3  6-2-x     64GB
Athl  650   K7          1.6/3.3  6-1-x     64GB
Athl  650   K75         1.6/3.3  6-2-x     64GB
Athl  650   T-bird      1.7      6-4-x     64GB
Athl  650   T-bird      1.75     6-4-x     64GB
Athl  700   K7          1.6/3.3  6-1-x     64GB
Athl  700   K75         1.6/3.3  6-2-x     64GB
Athl  700   T-bird      1.7      6-4-x     64GB
Athl  700   T-bird      1.75     6-4-x     64GB
Athl  750   K75         1.6/3.3  6-2-x     64GB
Athl  750   T-bird      1.7      6-4-x     64GB
Athl  750   T-bird      1.75     6-4-x     64GB
Athl  800   K75         1.7/3.3  6-2-x     64GB
Athl  800   T-bird      1.7      6-4-x     64GB
Athl  800   T-bird      1.75     6-4-x     64GB
Athl  850   K75         1.7/3.3  6-2-x     64GB
Athl  850   T-bird      1.7      6-4-x     64GB
Athl  850   T-bird      1.75     6-4-x     64GB
Athl  900   K75         1.8/3.3  6-2-x     64GB
Athl  900   T-bird      1.75     6-4-x     64GB
Athl  950   K75         1.8/3.3  6-2-x     64GB
Athl  950   T-bird      1.75     6-4-x     64GB
Athl  1G    K75         1.8/3.3  6-2-x     64GB
Athl  1G    T-bird      1.75     6-4-x     64GB
Athl  1.1G  T-bird      1.75     6-4-x     64GB
Athl  1.13G T-bird      1.75     6-4-x     64GB
Athl  1.2G  T-bird      1.75     6-4-x     64GB
Athl  1.3G  T-bird      1.75     6-4-x     64GB
Athl  1.33G T-bird      1.75     6-4-x     64GB
Athl  1.4G  T-bird      1.75     6-4-x     64GB
AthXP 1500+ Palomino    1.75     6-6-x     64GB
AthXP 1600+ Palomino    1.75     6-6-x     64GB
AthXP 1700+ Palomino    1.75     6-6-x     64GB
AthXP 1800+ Palomino    1.75     6-6-x     64GB
AthXP 1900+ Palomino    1.75     6-6-x     64GB
AthXP 2000+ Palomino    1.75     6-6-x     64GB
AthXP 2100+ Palomino    1.75     6-6-x     64GB
AthXP 1600+ T-bred      1.6      6-8-1     64GB
AthXP 1700+ T-bred      1.5      6-8-0     64GB
AthXP 1700+ T-bred      1.5      6-8-1     64GB
AthXP 1700+ T-bred      1.6      6-8-1     64GB
AthXP 1800+ T-bred      1.5      6-8-0     64GB
AthXP 1800+ T-bred      1.5      6-8-1     64GB
AthXP 1800+ T-bred      1.6      6-8-1     64GB
AthXP 1900+ T-bred      1.5      6-8-0     64GB
AthXP 2000+ T-bred      1.6      6-8-0     64GB
AthXP 2000+ T-bred      1.65     6-8-0     64GB
AthXP 2000+ T-bred      1.6      6-8-1     64GB
AthXP 2100+ T-bred      1.6      6-8-0     64GB
AthXP 2100+ T-bred      1.6      6-8-1     64GB
AthXP 2200+ T-bred      1.65     6-8-0     64GB
AthXP 2200+ T-bred      1.6      6-8-1     64GB
AthXP 2400+ T-bred      1.6      6-8-1     64GB
AthXP 2400+ T-bred      1.65     6-8-1     64GB
AthXP 2600+ T-bred      1.65     6-8-1     64GB
AthXP 2800+ T-bred      1.65     6-8-1     64GB
AthXP 2500+ Barton      1.65     6-A-0     64GB
AthXP 2600+ Barton      1.65     6-A-0     64GB
AthXP 2800+ Barton      1.65     6-A-0     64GB
AthXP 3000+ Barton      1.65     6-A-0     64GB
AthXP 3200+ Barton      1.65     6-A-0     64GB
AthXP 2000+ Thorton     1.6      6-A-0     64GB
AthXP 2200+ Thorton     1.6      6-A-0     64GB
AthXP 2400+ Thorton     1.65     6-A-0     64GB

Duron 550   Spitfire    1.5      6-3-0     64GB
Duron 550   Spitfire    1.5      6-3-1     64GB
Duron 600   Spitfire    1.5      6-3-0     64GB
Duron 600   Spitfire    1.5      6-3-1     64GB
Duron 650   Spitfire    1.5      6-3-0     64GB
Duron 650   Spitfire    1.5      6-3-1     64GB
Duron 700   Spitfire    1.5      6-3-0     64GB
Duron 700   Spitfire    1.5      6-3-1     64GB
Duron 750   Spitfire    1.6      6-3-x     64GB
Duron 800   Spitfire    1.6      6-3-x     64GB
Duron 850   Spitfire    1.6      6-3-x     64GB
Duron 900   Spitfire    1.6      6-3-x     64GB
Duron 900   Morgan      1.75     6-7-x     64GB
Duron 950   Spitfire    1.6      6-3-x     64GB
Duron 950   Morgan      1.75     6-7-x     64GB
Duron 1.0G  Morgan      1.75     6-7-x     64GB
Duron 1.1G  Morgan      1.75     6-7-x     64GB
Duron 1.2G  Morgan      1.75     6-7-x     64GB
Duron 1.4G  Applebred   1.5      6-8-8     64GB
Duron 1.6G  Applebred   1.5      6-8-8     64GB
Duron 1.8G  Applebred   1.5      6-8-8     64GB

AthMP 1.0G  Palomino    1.75     6-6-x     64GB
AthMP 1.2G  Palomino    1.75     6-6-x     64GB
AthMP 1500+ Palomino    1.75     6-6-x     64GB
AthMP 1600+ Palomino    1.75     6-6-x     64GB
AthMP 1800+ Palomino    1.75     6-6-x     64GB
AthMP 1900+ Palomino    1.75     6-6-x     64GB
AthMP 2000+ Palomino    1.75     6-6-x     64GB
AthMP 2000+ T-bred      1.6      6-8-1     64GB
AthMP 2100+ Palomino    1.75     6-6-x     64GB
AthMP 2200+ T-bred      1.65     6-8-1     64GB
AthMP 2400+ T-bred      1.65     6-8-1     64GB
AthMP 2600+ T-bred      1.65     6-8-1     64GB
AthMP 2800+ Barton      1.65     6-8-A     64GB

Notes:

The listed stepping only refers to the core CPU stepping ID. On the Pentium II, Pentium III, and Xeon CPUs that have discrete, external cache chips (not the Coppermine and Cascades chips), it isn't the core chip that determines cacheability. Instead, an additional cache controller chip (containing the TagRAM and MESI bits) mounted to the SEC substrate dictates actual cacheable range. It just so happens that certain steppings of certain CPUs are only paired with select cache controllers. For example: On the Pentium II, the 82459AB and 82459AC cache controller chips can cache up to 512MB of RAM. And the 82459AD controller chip can cache up to 4GB of memory. The older Pentium II Klamath chips come with the 82459AB controller and the initial Deschutes chips (6-5-0 step) come with the 82459AC cache controller, and therefore can only cache up to 512MB.
The P-Pro has two (or three for the 1MB P-Pro 200) chips in its dual cavity CPU design. One chip is the core die; the other is the cache die. The cache controller and TagRAM bits on the Pentium Pro are built onto the cache chip's die.
The Celeron, Pentium-III Coppermine, Xeon Cascades, Pentium Pro OverDrive, and K6-3 have the L2 cache (along with it's controller and TagRAM bits) built on-Die.
The Cumine PGA is the Pentium III Coppermine in the FC-PGA package. The Cumine-128 is the Celeron Coppermine-128. Despite their name, the Coppermine chips use aluminum interconnects, not copper.
The K7 (Athlon) is an unusual beast in that its primary TagRAM bits are included on the core CPU die itself (even though the L2 is off-Die). This on-Die Tag can utilize 512KB of external L2 cache on the SEC and can cache up to 64GB of RAM (the model 1 Athlon supports PAE-36 memory extensions; the model 2 Athlon supports both PAE-36 and PSE-36). But if there is more than 512KB of external L2 present, then the internal Tag can only provide partial coverage and an external cache controller must provide some of its own Tag bits. The L2 on the K7 is 2-way set associative for 512KB, 1MB, and 2MB cache sizes. For 4MB, 8MB, and 16MB cache sizes, the L2 operates as direct mapped cache.
The K7 has a 64-byte (512-bit) cache line size; the Intel P6/P-II/Celeron chips have 32-byte cache lines. The K6 also has 64-byte cache lines, but it's broken down into two 32-byte sectors. The P-4 has 128-byte cache lines broken down into two 64-byte sectors.
On the AMD K6 and early K6-2's (5-8-0 step, 26050), the write-allocate function cannot be used on memory addresses above 508MB. The later K6-2 CXT (5-8-C step, 26351) and K6-III chips do not suffer from this limit with write-allocate. AFAIK, this doesn't affect the chip's cacheable range for its L1 cache.
Even though the Pentium III Coppermine and Pentium III Xeon Cascades chips both use the same core die, Intel says the Coppermine's L2 only caches up to 4GB of RAM. The Xeon version can cache up to 64GB.
Intel originally stated that the L2 cache on the Pentium II OverDrive for Socket 8 systems could cache up to 64GB of memory. The datasheet now says it caches only 4GB; I'm not sure which is correct.
Even though many of the chips listed above have 64GB as their cacheable range, anything over 4GB is rather uncommon with x86 architectures. To even address more than 4GB, you need to use an extended memory architecture (PAE-36 or PSE-36). Cacheable ranges above 4GB are technically possible, but are not commonly used. BTW, the AMD K7 also has a 43-bit (8TB) memory mode, but this is an Alpha addressing mode, not x86. Presumably the K7 has enough Tag bits to fully cache this memory space as well.
In every case that I'm aware of, the processor's L1 cache can cache the full amount of memory that is addressable by the CPU.

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