Description
Intel Socket 7 Motherboard SB82371SB PIIX3 Chipset AB1021 PCI ISA SIMM 1995
This is an Intel Socket 7 system board built around the Intel SB82371SB PCIset — better known as the PIIX3 (PCI ISA IDE Xcelerator) — a highly integrated southbridge chip that handles PCI-to-ISA bridging, IDE controller functions, and USB support in a single package. The board carries the internal designation AB1021 and dates to 1995 based on the date code stamped on the chipset. It accepts Socket 7 processors and provides a mix of PCI and ISA expansion slots alongside SIMM memory slots.
Specifications & What's Included
- CPU Socket: Socket 7 (ZIF) — compatible with Intel Pentium, AMD K5/K6, Cyrix 6x86
- Southbridge Chipset: Intel SB82371SB (PIIX3 — PCI ISA IDE Xcelerator), date code 1995
- Board Reference: AB1021
- Expansion Slots: 4 x PCI, 3 x ISA
- Memory Slots: 4 x SIMM (EDO/FPM DRAM)
- Storage: Integrated IDE controller (via PIIX3) and floppy connector
- Rear I/O: Serial port, parallel port, PS/2 keyboard and mouse connectors
- Bus Architecture: PCI / ISA
- Form Factor: AT / Baby-AT
- Year: 1995 (Intel © '95 marked on chipset)
- Includes: Motherboard only — no CPU, RAM, or cables included
Applications
Socket 7 motherboards like this one were the mainstream desktop computing platform of the mid-1990s, supporting the original Intel Pentium processor family from 75 MHz through 200 MHz, as well as compatible CPUs from AMD (K5, K6) and Cyrix (6x86). The Intel PIIX3 chipset was widely used in OEM systems of this era because it consolidated multiple functions — PCI-to-ISA bridge, dual-channel IDE, USB 1.0, and DMA control — into a single chip, reducing board complexity and cost. This board would have been the heart of a mid-1990s desktop PC running Windows 95, Windows 3.1, or MS-DOS. Today, Socket 7 boards are sought by vintage PC enthusiasts, retrocomputing hobbyists, and collectors building or restoring period-accurate systems from the mid-1990s Pentium era. The PCI and ISA slot combination is particularly valued for running original ISA-bus sound cards and other period peripherals alongside newer PCI devices.
This Intel Socket 7 Motherboard (AB1021) with the SB82371SB PIIX3 chipset has been tested at our facility and is in good working condition. The board is clean overall with light dust and minor surface wear typical of used equipment from this era. The Socket 7 ZIF socket, PCI slots, ISA slots, and SIMM slots all appear intact with no bent pins or broken tabs visible. Rear I/O bracket connections including serial, parallel, and PS/2 ports are present. Please review our photos for a full view of cosmetic condition and contact us with any questions.
Warranty Information
Additional Information
Brand: |
Intel |
Model: |
AB1021 |
MPN: |
SB82371SB |
Secondary Model: |
SB82371SB |
SKU: |
28127 |
Type: |
Motherboard / System Board |
Chipset: |
Intel SB82371SB PIIX3 (PCI ISA IDE Xcelerator) |
Socket Type: |
Socket 7 |
CPU Compatibility: |
Intel Pentium, AMD K5/K6, Cyrix 6x86 (Socket 7) |
Memory Type: |
SIMM (EDO/FPM) |
Memory Slots: |
4 x SIMM |
Expansion Slots: |
4 x PCI, 3 x ISA |
Form Factor: |
AT / Baby-AT |
I/O Ports: |
Serial, Parallel, PS/2 keyboard and mouse |
Bus Architecture: |
PCI / ISA |
Year / Era: |
1995 (Intel © '95 date code on chipset) |
Country/Region of Manufacture: |
United States |
Compatible With: |
Socket 7 CPUs: Pentium 75–200, AMD K5/K6, Cyrix 6x86 |
Condition Notes: |
This Intel Socket 7 Motherboard (AB1021) with SB82371SB PIIX3 chipset has been tested at our facility and is in good working condition. Light dust and minor wear typical of used equipment. All slots and I/O ports intact. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |