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 Technology ValueRAM 8GB DDR3 1600MHz PC3 12800 ECC CL11 DIMM with TS Server Workstation Memory KVR16E11/8 at Amazon.com
SAMSUNG 8GB DDR3 SO-DIMM Memory Module at Amazon.com