G.SKILL Ares Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Intel Z87/ Z77/ Z68/ P67 Low Profile Extreme Performance Memory Model F3-1600C9D-16GAB at Amazon.com
Crucial 8GB 240-Pin DDR3 SDRAM ECC Registered DDR3 1600 (PC3 12800) Server Memory Model CT8G3ERSLD8160B - Newegg.com
Desktop - DDR3 1600 (PC3-12800) | TigerDirect.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