Patriot Viper Xtreme Series DDR3 8 GB (2 x 4 GB) PC3-12800 1600MHz 8-9-8-24 for Intel Core i5 Core i7 PX538G1600LLK Equipped with an extruded aluminum shield built around a copper core to provide improved cooling Extreme Performance PC3-12800 (1600MHz) Low Latency (8-9-8-24) XMP Ready Voltage: 1.65V 100% Tested and Verified on Intel P55 platform with Core i5 and Core i7 processors Lifetime Warranty