OFFTEK 1GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad S51 (260M) (DDR2-4200) Laptop Memory at Amazon.com
2GB KIT (2 x 1GB) for IBM Lenovo ThinkCentre S50 Type 8418 8429 S51 Type 8098 8171. DIMM DDR Non-ECC PC2700 333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com