Arch Memory 2 GB (1 x 2 GB) 200-Pin DDR2 So-dimm for Apple iMac RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 2GB DDR2-800 PC2-6400 200-Pin Sodimm CL 6 Dual Rank (2Rx8) Please Check your Computer Specifications before ordering to ensure compatibility Lifetime Replacement Warranty Included