Arch Memory 1 GB (1 x 1 GB) 184-Pin DDR UDIMM Interchangeable with KVR333X64C25/1G RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 1GB DDR333 PC2700 184Pin UDIMM CL2.5 Dual Rank (2Rx8) Non-ECC Unbuffered 333MHz Lifetime Replacement Warranty Included