Arch Memory Certified for Dell 4 GB (2 x 2 GB) SNPTX760CK2/4G A7548317 200-Pin DDR2-800 PC2-6400 So-dimm RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 2 x 2GB DDR2-800 PC2-6400s 200-Pin Sodimm CL6 Dual Rank (2Rx8) 800MHz Lifetime Replacement Warranty Included