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 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 2025-02-23T20:29:11Z
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
Image 1 of 7 (Microhouse)
Image 2 of 7 (Predator99)
Image 3 of 7
Image 4 of 7 (ThisOldTech)
Image 5 of 7
Image 6 of 7 (ThisOldTech)
Image 7 of 7 (mamut-tme)
Disclaimer
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