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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 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