Arch Memory 4 GB (1 x 4 GB) 204-Pin DDR3 So-dimm RAM for Toshiba Satellite Models A505-S6005 A505-S6025 A665-S6050 A665-S6056 A665-S6070 E205-S1904 Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 4GB DDR3-1333 PC3-10600 204-Pin Sodimm 1.5v Dual Rank (2Rx8) 1333MHz Lifetime Replacement Warranty Included