Arch Memory 1 GB (1 x 1 GB) 200-Pin DDR So-dimm for Toshiba Satellite A75-S231 RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 1GB DDR333 PC2700 200Pin Sodimm CL2.5 Dual Rank (2Rx8) 333MHz Lifetime Replacement Warranty Included