Arch Memory Certified for Dell 4 GB (1 x 4 GB) SNPVT8FPC/4G A6994459 240-Pin DDR3-1600 PC3-12800 UDIMM RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 4GB DDR3L-1600 PC3L-12800U 240-Pin UDIMM Dual Rank (2Rx8) 1600MHz Non-ECC Unbuffered Lifetime Replacement Warranty Included