Edgetech SDRAM DDR3 1600 (PC3 12800) PE234546 at Amazon.com
G.Skill Ripjaws X Series 16 GB (2 x 8 GB) 240-Pin SDRAM (PC3-12800) DDR3 1600 CL10-10-10-30 1.50V Dual Channel Desktop Memory Model F3-12800CL10D-16GBXL at Amazon.com
Kingston 4GB 1333MHz DDR3 DIMM Memory For Select Dell Desktops at Amazon.com