Corsair CMZ4GX3M1A1600C9B Vengeance Blue 4GB (1x4GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V at Amazon.com
Corsair Vengeance Red 16GB (2x8GB) DDR3 1600 MHz (PC3 12800) Desktop Memory at Amazon.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