PCChips/Hsin Tech M921 (486)
Chipset
Socket 
FSB speeds 25MHz33MHz40MHz50MHz
Form factorBaby AT (max 220 x 330 mm)
Dimensions254 mm x 218 mm
Cache
128KB256KB512KB
Max RAM size
256MB
RAM types 72-pin FPM72-pin EDO
PSU connector
Multi CPU supportno
Also known as
I/O ports1x
AT Keyboard
1x
Floppy interface
2x
IDE interface
1x
Parallel
2x
Serial
Expansion slots4x
16-bit ISA
3x
32-bit PCI
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 DIP-chips and no jumpers to set the chache size. Cache functionality can usually be restored by installing proper chips, jumpers and a BIOS update/mod.
Last updated 2026-02-15T18:29:51Z
Board info score is 9.6/10
Chips
-> Chipset part
-> Clock Synth / PLL
-> Real-Time Clock
-> Signal transmitter/receiver
-> Super I/O
CPU family support
2 BIOS files available
AMI - 2 entries
POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
41-P400-001437-00101111-101094-486AVIP
Note
Core version
101094
BIOS version
Logs
POST string
41-P000-001437-00101111-101094-486AVIP
Note
Core version
101094
BIOS version
Logs
No drivers available
2 board documents available
Chip
Release date
File
Logs
Family
Release date
File
Logs
Family
Release date
1996-03
File
Logs
Image 1 of 5 (Microhouse)
Image 2 of 5 (Predator99)
Image 3 of 5 (ThisOldTech)
Image 4 of 5 (ThisOldTech)
Image 5 of 5 (mamut-tme)
Disclaimer
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