IBM PS/2 MODEL 55SX & 55LS (8555) (Late)
chipChipset
cpuCPU sockets
speedFSB speed
16MHz
moboForm factor
OEM / Proprietary
dimDimensions
330mm x 218mm
chipCache
None/Integrated in the CPU
ramMax RAM size
8MB
ramRAM type
72-pin FPM
pwrPSU connector
connI/O ports
1x 
Floppy interface
1x 
Parallel
1x 
Serial
cardExpansion slots
3x 
16-bit MCA
1x 
AVE (MCA)

Also known as:

  • IBM 27F4667
  • IBM 57F1536
  • IBM 57F3003
  • IBM 84F6889

Known issues:

  • DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

Last updated 2024-01-01T13:34:24Z
Score is 6.8/10
0 files available
drv No drivers available
doc No documents available

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