PowerTech MB455
Chipset
Socket 
FSB speeds 25MHz33MHz40MHz50MHz
Form factorBaby AT (max 220 x 330 mm)
DimensionsEmpty
Cache
None/Integrated in the CPU
Max RAM size
Empty
RAM types 30-pin SIMM72-pin FPM
PSU connector
Multi CPU supportno
Also known as
I/O ports1x
AT Keyboard
Expansion slots7x
16-bit ISA
3x
32-bit VLB
Known issues
- Leaky Ni-Cd clock battery
The Ni-Cd battery may be leaking, risking damage to PCB layers & nearby components. Promptly remove the battery & clean corrosion/alkaline salts from the board. Use white vinegar to dissolve salts, but exercise caution as vinegar can corrode exposed metals. A thorough examination & repair may be needed. Replace battery with guide: https://github.com/wiretap-retro/Not-A-Varta
Last updated 2025-05-02T07:17:48Z
Board info score is 8.4/10
Chips
-> Chipset part
CPU family support
4 BIOS files available
Award - 6 entries
POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
10/20/94-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
MB45XB GPC
Logs
POST string
12/20/94-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
Logs
POST string
10/21/94-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
Logs
POST string
02/07/95-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
Logs
No drivers available
1 board document available
Release date
File
Logs
Family
Release date
File
Logs
Family
Release date
1996-03
File
Logs
Image 1 of 3 (evasive)
Image 2 of 3 (uniQ)
Image 3 of 3 (uniQ)
Disclaimer
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