PS/2 Proprietary SIMMs

For an explanation of the difference between PS/2 SIMMs and Industry Standard SIMMs visit Louis Ohland's Memory Identification page, extensive list of many part numbers for PS/2 SIMMs can be found on his Memory Reference page.

Below is a short summary of the IBM PS/2 SIMMs that I have found applicable to PS/2 8580 bus memory adapters.

Size Speed Option Numbers FRU Number Manufacturing (Visible) Number
1 MB 85 ns 6450603 90X8624 65X6264
2 MB 85 ns 6450604, 92G7196 92F0104 65X6249, 68X6127
80 ns 6450608 92F0103 65X5806
4 MB 80 ns 87F9977, 92G7199 92F3337 68X6343
70 ns 6450128, 92G7200 92F0105 71F7010

If you are looking for an IBM source of Marketing part numbers and FRU (Field Replaceable Unit) part numbers and other details, visit IBM Memory Cross-Reference (?) and PS/1 PS/2 PC Memory Reference.

Content created and/or collected by:
Louis Ohland, Peter Wendt, William Walsh, Kevin Bowling, Jim Shorney, Tim Clarke, David Beem, Tatsuo Sunagawa, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 12 Jun 2021 - Changes & Credits | Legal Info & Contact