IBM Thinkpad R31 2657-NU1 memory
Maximum Memory: 1gb
Base Memory: 64mb/128mb/256mb (Removable)
Upgrade Sockets: 2 (2 banks of 1)
128Mb Part Number: 19K4652, 19K4653, 39P4503
256Mb Part Number: 19K4654, 19K4655, 39P4502
512Mb Part Number: 19K4656, 19K4657, 39P7288
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