PowerTech MB455
chipChipset
cpuSocket
Socket 3 (PGA237)
speedFSB speeds
25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
Empty
chipCache
None/Integrated in the CPU
ramMax RAM size
Empty
ramRAM types
30-pin SIMM72-pin FPM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
7x 
16-bit ISA
3x 
32-bit VLB

Also known as:

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 2024-06-27T18:31:59Z
Board info score is 8.4/10
chipChipset parts
UMC UM8496 UMC UM8498F
cpuCPU family support
3 files available

Vendor: Award [6 entries]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
05/24/95-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
Logs
POST string
12/20/94-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
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
AV8540/AV8541 VER. V10
Logs
POST string
02/07/95-UMC-498GP-2C4X6000-00
Note
Core version
4.50G
BIOS version
Logs
drv No drivers available
doc 1 board document available
Release date
File
Logs
Release date
File
Logs
Family
Release date
File
Logs
Family
Release date
1989-04
File
Logs
Family
Release date
1990
File
Logs
Family
Release date
1992-10
File
Logs
Family
Release date
1992-02
File
Logs

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