EFA P55T2-PIO-B
Logs
chipChipset
cpuSocket
Socket 7 (PGA321)
speedFSB speeds
50MHz60MHz66MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
254mm x 218mm
chipCache
256KB512KB
ramMax RAM size
256MB
ramRAM types
72-pin FPM72-pin EDO
pwrPSU connector
AT (6-pin P8 + 6-pin P9)
tag Also known as
connI/O ports
1x 
AT Keyboard
1x 
Floppy interface
2x 
IDE interface
1x 
PS/2 mouse
1x 
Parallel
2x 
Serial
cardExpansion slots
3x 
16-bit ISA
4x 
32-bit PCI
notes Notes

Compared to P55T2-PIO/P55T2-SPIO this version has PLB cache chips. Three possible SIO chips: SMC669/UMC8669/ALI M5113 so you need to pay attention what bios to flash!

Socket 7 pin A17 incorrectly wired in the PCB and bridges VCC2 and VCC3 on intel MMX CPUS which will run the cpu core at io voltage and eventually destroy the cpu. Removal of pin A17 is all that is needed to fix this hardware design bug.

Last updated 2025-09-07T12:28:57Z
Board info score is 9.4/10
bios 7 BIOS files available

vendor Award - 6 entries

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
10/01/96-i430HX-2A59FE3DC-00
Note
w/ Sound
Core version
4.51PG
BIOS version
Logs
POST string
06/14/96-i430HX-2A59FE3DC-00
Note
w/ Sound
Core version
4.51PG
BIOS version
Logs
POST string
10/01/96-i430HX-2A59FE3DC-00
Note
no Sound
Core version
4.51PG
BIOS version
Logs
POST string
06/14/96-i430HX-2A59FE3DC-00
Note
no Sound
Core version
4.51PG
BIOS version
Logs
POST string
04/23/97-i430HX-2A59FE3CC-00
Note
Core version
4.51PG
BIOS version
Logs
POST string
01/23/97-i430HX-2A59FE3CC-00
Note
Core version
4.51PG
BIOS version
Logs

vendor Mr. BIOS - 1 entry

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
Note
Core version
3.46
BIOS version
Logs
drv 5 drivers available
Name
Version
OS support
Arch
Size
Filename
Name
Version
3.00
OS support
OS/2 Warp 3.x Windows NT 3.5x Windows NT 4.0
Arch
x86
Size
1.2MB
Filename
Name
Version
4.05.02
OS support
Windows 9x
Arch
x86
Size
358.1KB
Filename
Name
Version
3.7B / 3.7D
OS support
MS-DOS NetWare Server 3 NetWare Server 4 OS/2 Warp 3.x Windows 3.1x Windows 9x Windows NT 3.5x
Arch
x86
Size
1.6MB
Filename
Version
OS support
Arch
Size
Filename
Version
OS support
Windows 9x
Arch
x86
Size
569.7KB
Filename
Version
OS support
Windows 9x
Arch
x86
Size
577.8KB
Filename
doc 2 board documents available
Release date
File
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File
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File
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Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
2009-10
File
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Chip
Release date
File
Logs
Chip
Release date
2013-04
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
2004-11
File
Logs
Chip
Release date
2025-10
File
Logs
Chip
Release date
2002-10-20
File
Logs
Chip
Release date
1995-11-30
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
2006-01
File
Logs
Chip
Release date
2002-10-20
File
Logs
Chip
Release date
File
Logs
Chip
Release date
1995-11-22
File
Logs
Chip
Release date
File
Logs
Chip
Release date
1994-07
File
Logs
Chip
Release date
1996-01
File
Logs
Family
Release date
File
Logs
Family
Release date
1997-06
File
Logs
Family
Release date
1998-01
File
Logs
image1 Image 1 of 3 (Microhouse)
image2 Image 2 of 3 (Petros Savvas)
image3 Image 3 of 3 (TheMobRules)

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