Patriot Memory's Viper 3 Series memory kits are designed with true performance in mind. Tested & compatible with Intel's® DDR3 compatible processors & chipsets, The Viper 3 series provides the best performance & stability for the most demanding computer environments. The Viper 3 series utilizes a custom designed high performance heat shield for superior heat dissipation to ensure rock solid performance even when using the most taxing applications. Built from the highest quality Build of Materials, Patriot Memory's Viper 3 Series memory kits are hand tested & validated for system compatibility. Hand tested for quality assurance, the Viper 3 series is backed by a lifetime manufacturer warranty. Specification Capacity: 16GB (2 x 8GB) Series: Viper 3 Edition: Black Mamba Capacity: 8GB (2 x 4GB) kit DIMM Type: 240-Pin NON-ECC UDIMM Voltage: 1.5V Tested Frequency: PC3-17000 (2133 M Hz) Tested Timings: 11-11-11-27 Tested Platforms: Intel® 6 & 7 Series Feature Overclock: XMP 1.3