Compatible with IBM OEM part numbres 31P9834, 31P9835, 10K0035, 10K0034, 33R4967 2pcs 1GB 200pin PC2700 2.5V DDR333 SODIMM. Manufactured by Computer Memory Solutions This module uses the latest high density chips which draw less power and run cooler than other brands. This keeps you notebook running more stably. Lifetime exchange or repair warranty against manufacturing defects. by Computer Memory Solutions Compatible with: Lenovo ThinkPad X40 2369, X40 2370, X40 2371-xxx, X40 2372, X40 Series (Type 2382), X40 Series (Type 2386).