Gigabyte GA-486AM
chipChipset
cpuCPU socket
Socket 3 (PGA237)
speedFSB speeds
25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
250mm x 220mm
chipCache
128KB256KB512KB1MB
ramMax RAM size
128MB
ramRAM type
72-pin FPM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
1x 
Floppy interface
2x 
IDE interface
1x 
Parallel
2x 
Serial
cardExpansion slots
4x 
16-bit ISA
3x 
32-bit PCI

Also known as:

  • Gigabyte GA-486AM/S (Ver 2.1A)
  • Gigabyte GA-486AM/S (Ver 2.20/2.21)

Known issues:

  • DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

Notes:

Clock chip: UM9515-01

Last updated 2023-10-14T17:21:09Z
Board info score is 9.6/10
chipsetChipset
chipChipset parts
UMC UM8881 UMC UM8886AF
chipMiscellaneous chips
UMC UM8667 (RS-232 driver)
chipClock Synth / PLL chips
UMC UM9515
chipSuper I/O chips
UMC UM8663
chipReal-Time Clock chips
Dallas DS12887
cpuCPU family support
6 files available

Vendor: Award [7 entries]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
10/03/95-UMC-881/886A-2A4X5G0HC-00
Note
Core version
4.50PG
BIOS version
Logs
POST string
11/07/95-UMC-881/886A-2A4X5G0HC-00
Note
Core version
4.50PG
BIOS version
Logs
POST string
11/07/95-UMC-881/886A-2A4X5G0HC-00
Note
Core version
4.50PG
BIOS version
Logs
POST string
11/07/95-UMC-881/886A-2A4X5G09C-00
Note
Core version
4.50PG
BIOS version
Nov 7 1995
Logs
POST string
11/01/95-UMC-881/886A-2A4X5G0HC-00
Note
Core version
4.50PG
BIOS version
Logs
POST string
06/22/95-UMC-881/886A-2A4X5G0HC-00
Note
Core version
4.50PG
BIOS version
Logs
POST string
02/20/95-UMC-881/886A-2A4X5G03-00
Note
Core version
4.50G
BIOS version
Logs
drv No drivers available
doc 3 board documents available
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