4xx chipsets

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80486 chipsets

Chipset Code Name South Bridge Release Date Processors FSB SMP Memory types Max. memory Parity/ECC L2 Cache Type PCI support
420TX Saturn
November 1992 5 V 486 Up to 33 MHz No FPM 128 MB Parity Async. 2.0
420EX Aries
March 1994 5 V/3.3 V 486 Up to 50 MHz No FPM 128 MB Parity Async. 2.0
420ZX Saturn II
March 1994 5 V/3.3 V 486 Up to 33 MHz No FPM 160 MB Parity Async. 2.1

Pentium chipsets

While not an actual Intel chipset bug, the Mercury and Neptune chipsets could be found paired with RZ1000 and CMD640 IDE controllers with data corruption bugs.

Chipset Code Name Part Numbers South Bridge Release Date Processors FSB SMP Memory types Max. memory Max. cacheable Parity/ECC L2 Cache Type PCI support AGP support
430LX Mercury S82434LX SIO March 1993 P60/66 66 MHz No FPM 192 MB 192 MB Parity Async. 2.0 No
430FX Triton SB82437FX-66 SB82437JX PIIX January 1995 P75+ 66 MHz No FPM/EDO 128 MB 64 MB Neither Async./Pburst 2.0 No
430MX Mobile Triton 82437MX MPIIX October 1995 P75+ 66 MHz No FPM/EDO 128 MB 64 MB Neither Async./Pburst 2.0 No
430HX Triton II FW82439HX FW82439JHX PIIX3 February 1996 P75+ 66 MHz Yes FPM/EDO 512 MB 512/64 MB
depending on Tag RAM used		 Both Async./Pburst 2.1 No
430VX Triton II SB82437VX SB82438VX PIIX3 February 1996 P75+ 66 MHz No FPM/EDO/SDRAM 128 MB 64 MB Neither Async./Pburst 2.1 No
430TX
FW82439TX PIIX4 February 1997 P75+ 66 MHz No FPM/EDO/SDRAM 256 MB 64 MB Neither Async./Pburst 2.1 No

Pentium Pro/II/III chipsets

Chipset Code Name Part numbers South Bridge Release Date Processors FSB SMP Memory types Max. memory Memory banks Parity/ECC PCI support AGP support
450KX Mars 82451KX, 82452KX, 82453KX, 82454KX Various November 1995 Pentium Pro 66 MHz Yes FPM 8 GB
Both 2.0 No
450GX Orion 82451GX, 82452GX, 82453GX, 82454GX Various November 1995 Pentium Pro 66 MHz Yes (up to four) FPM 8 GB
Both 2.0 No
440FX Natoma 82441FX, 82442FX PIIX3 May 1996 Pentium Pro/Pentium II 66 MHz Yes FPM/EDO/BEDO 1 GB 4 Both 2.1 No
440LX Balboa 82443LX PIIX4 August 1997 Pentium II/Celeron 66 MHz Yes FPM/EDO/SDRAM 1 GB EDO/512 MB SDRAM 4 Both 2.1 AGP 1×
440EX n/a 82443EX PIIX4E April 1998 Celeron/Pentium II 66 MHz No EDO/SDRAM 256 MB 2 Neither 2.1 AGP 1×
440BX Seattle 82443BX PIIX4E April 1998 Pentium II/III, Celeron 66/100 MHz Yes EDO/SDRAM 1 GB 4 Both 2.1 (64-bit optional) AGP 2×
440GX n/a 82443GX PIIX4E June 1998 Pentium II/III, Xeon 100 MHz Yes SDRAM 2 GB 4 Both 2.1 AGP 2×
450NX n/a 82451NX, 82452NX, 82453NX, 82454NX PIIX4E June 1998 Pentium II/III, Xeon 100 MHz Yes (up to four) FPM/EDO 8 GB 4 Both 2.1 (64-bit optional) No
440ZX/440ZX-66 n/a 82443ZX PIIX4E November 1998 Celeron, Pentium II/III 100/66 MHz No SDRAM 512 MB 2 Neither 2.1 AGP 2×
440ZX-M n/a 82443ZX-M PIIX4M
Pentium III/mobile Celeron 66 MHz No SDRAM 256 MB 2 Neither 2.1 AGP 2×
440MX Banister 82443MX Same chip
Pentium II/III, mobile Celeron 66/100 MHz No SDRAM 256 MB 2 Neither 2.2 No

Southbridge 4xx chipsets

Main articles: PCI IDE ISA Xcelerator and Super I/O
Chipset Part Number ATA support USB support CMOS/clock ISA support LPC support Power management
SIO 82378IB/ZB None None No Yes No SMM
PIIX 82371FB PIO/WDMA None No Yes No SMM
MPIIX 82371MX PIO None No Yes No SMM
PIIX3 82371SB PIO/WDMA 1 Controller, 2 Ports No Yes No SMM
PIIX4 82371AB PIO/UDMA 33 1 Controller, 2 Ports Yes Yes No SMM
PIIX4E 82371EB PIO/UDMA 33 1 Controller, 2 Ports Yes Yes No SMM
PIIX4M 82371MB PIO/UDMA 33 1 Controller, 2 Ports Yes Yes No SMM

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