[ HISTORICAL SYSTEM BOARD // IDENTIFIED MODEL ]
GIGABYTE GA-486AM
Socket 3 PCI/ISA 486 motherboard, mid-1990s. This record distinguishes the exact model from related variants and requires revision-matched documentation for service.
IDENTIFY THE PCB: Record model suffix, board revision, chipset markings, BIOS label and date codes before applying any family-level compatibility information.
Model specifications
| Exact model | GIGABYTE GA-486AM |
|---|---|
| Generation / chipset | Socket 3 PCI/ISA 486 motherboard, mid-1990s; ALI Aladdin/486 PCI chipset family is associated with GA-486AM; verify chip labels on the individual board. |
| CPU socket / processor | Socket 3 486SX/DX/DX2/DX4-class CPUs as allowed by GA-486AM revision, core-voltage jumpers, external clock and BIOS. |
| RAM technology / capacity | 72-pin SIMM FPM DRAM; 128 MB maximum is reported for this family, conditional on supported chip density and correct bank population. |
| Form factor | Baby AT. |
| Bus, slots & I/O | PCI and 16-bit ISA slots; IDE, floppy, serial, parallel and keyboard interfaces. Use the manual’s board layout for exact slot count and header pinouts. |
| Jumpers / BIOS compatibility | AMI/Award BIOS variants are reported; match the BIOS label and PCB revision. Clock, voltage and CPU-type selections use revision-specific jumpers. |
Jumper, BIOS & compatibility notes
GA-486AM firmware and jumper settings must not be borrowed from GA-486AM/S or unrelated GA-486 boards. Validate the board silk-screen and CPU support table before upgrade.
AMI/Award BIOS variants are reported; match the BIOS label and PCB revision. Clock, voltage and CPU-type selections use revision-specific jumpers. Matching socket or connector geometry alone does not establish CPU, memory or firmware compatibility.
Safety & preservation
ESD-safe handling; inspect battery leakage, socket wear and electrolytic capacitors. Document jumpers, ROM labels and memory positions; do not connect uncertain AT P8/P9 power plugs.
Preserve provenance, original labels, jumpers and test conditions. Photograph the board before repair; avoid aggressive cleaning or desoldering until corrosion and component risks are documented.
Manufacturer and archive manuals
- GIGABYTE GA-486AM scanned manual — The Retro WebDirect archive manual scan for board layout, memory and setup information.
- GIGABYTE GA-486AM model record — The Retro WebBoard record and revision identity for comparison with the physical unit.
Archived copies may cover another board revision. Compare manual diagrams and revision identifiers with the physical PCB; do not flash firmware or set voltage jumpers from a related model's manual.