PCChips M921 (486)
chipChipset
cpuCPU socket
speedFSB speeds
25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
254 mm x 218 mm
chipCache
128KB256KB512KB
ramMax RAM size
256MB
ramRAM types
72-pin FPM72-pin EDO
pwrPSU connector
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:

  • CONCORD OFFICE AUTOMATION INDUSTRIAL (HK),, LTD. COA-921

Known issues:

  • Fake cache

The motherboard may include a non-functional or counterfeit SRAM cache, which can adversely affect performance. Signs of fake cache often include soldered QFP or DIP-chips labeled "WRITE-BACK" with traces that do not connect to the chipset.

  • DIP chips can typically be removed and replaced with functional SRAM chips in sockets to restore cache functionality.
  • QFP fake cache chips are often not replaceable with functional cache as the PCB footprints are not chipset connected.
Last updated 2023-10-14T17:34:58Z
Score is 9.4/10
2 files available

Vendor: AMI [2 entries]

POST string
Note
Core Ver.
BIOS Ver.
Last edit
POST string
41-P400-001437-00101111-101094-486AVIP
Note
Core version
101094
BIOS version
Last edit
pwr 2020-04-27
POST string
41-P000-001437-00101111-101094-486AVIP
Note
Core version
101094
BIOS version
Last edit
pwr 2020-04-27
drv No drivers available
doc 2 board documents available
Language
Release date
File
Last edit
Language
English
Release date
File
Last edit
pwr 2022-10-11
Language
English
Release date
File
Last edit
pwr 2020-04-26
chipdoc 1 chip document available
Chip
Language
Release date
File
Last edit
Chip
Language
English
Release date
File
Last edit
pwr 2023-10-14

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