PowerTech MB459
Logs
chipChipset
cpuSocket
Socket 3 (PGA237)
speedFSB speeds
25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
220mm x 250mm
chipCache
0B128KB256KB512KB
ramMax RAM size
64MB
ramRAM type
72-pin FPM
pwrPSU connector
AT (6-pin P8 + 6-pin P9)
tag Also known as
connI/O ports
1x 
AT Keyboard
cardExpansion slots
6x 
16-bit ISA
wrench 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

notes Notes

Add support for 3.3V CPUs by soldering LT1085CT, manual pg.8.

Last updated 2025-07-30T19:28:21Z
Board info score is 9.4/10
chip Chips
-> Chipset part
UMC UM8496 UMC UM8498F
-> Clock Synth / PLL
Macronix MX8315
cpufam CPU family support
bios 3 BIOS files available

vendor AMI - 1 entry

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-P301-001815-00101111-072594-UMC498
Note
Core version
072594
BIOS version
Logs

vendor Award - 4 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
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
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Family
Release date
File
Logs
Family
Release date
1996-03
File
Logs
Family
Release date
1995-07
File
Logs
Family
Release date
1995-10
File
Logs
Family
Release date
1995-12
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
image1 Image 1 of 7
image2 Image 2 of 7 (Clous)
image3 Image 3 of 7 (H.W.Necromancer)
image4 Image 4 of 7 (jensma)
image5 Image 5 of 7 (Clous)
image6 Image 6 of 7 (jensma)
image7 Image 7 of 7 (Clous)

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