Arch Memory 1 GB (1 x 1 GB) 240-Pin DDR2 UDIMM 240-Pin DDR2 UDIMM RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 1GB DDR2-800 PC2-6400 240Pin UDIMM CL6 Non-ECC Unbuffered 800MHz Lifetime Replacement Warranty Included