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
Ddr3 Ram - Best Buy
Ramjet 16GB DDR3-1600 PC3-12800 DDR3 1600Mhz SO-DIMM Kit for Apple iMac (2X 8GB) at Amazon.com