Newegg.ca - SAMSUNG 4GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model MV-3V4G3/US
Get as many as you want. Got mine from 1600 11-11-11-30 1,35v to 1850 9-9-9-24 or 2100 10-10-10-27, both at 1,6v. REALLY good overclocking ram for the price. At this moment, nothing beats it. Google them for some impressive results.