Patriot Viper Xtreme Performance 16 GB DDR3 2133 PC3 17000 (PXQ316G2133C9QK) Extreme Performance PC3-17000 (2133MHz) Low Latency (9-11-10-27) Voltage: 1.65V Equipped with an extruded aluminum shield build around a copper core to provide improved cooling 100% Tested and Verified RoHS Compliant Only compatible with In tel X79 chipsets