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
ADATA Premier Series - DDR3 - 16 GB: 2 x 8 GB - SO-DIMM 204-pin - 1333 MHz / PC3-10600 - CL9 - 1.5 V - unbuffered - non-ECC - Walmart.com
16GB (4 X 4GB) DDR3 1600MHz PC3-12800 240-pin Memory RAM DIMM Kit for Desktop PC by NEMIX RAM at Amazon.com