Arch Memory 16 GB (2 x 8 GB) 240-Pin DDR3 UDIMM Interchangeable with CMV16GX3M2A1333C9 RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 2 x 8GB DDR3-1333 PC3-10600 240-Pin UDIMM Non-ECC Unbuffered 1.5v Dual Rank (2Rx8) 1333MHz Lifetime Replacement Warranty Included