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 XPG V2 Review: 2x8 GB at DDR3-2400 C11-13-13 1.65 V
Corsair Vengeance Blue 16GB (2x8 GB) DDR3 1600MHz (PC3 12800) Desktop Memory 1.5V at Amazon.com
Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com