Arch Memory 2 GB (1 x 2 GB) 240-Pin DDR3-1600 PC3-12800 UDIMM RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 2GB DDR3-1600 PC3-12800 240Pin UDIMM 1.5v Single Rank (1Rx8) Non-ECC Unbuffered 1600MHz Lifetime Replacement Warranty Included