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The black mamba Viper 3 8GB (2 x 4GB) DDR3 CL10 1866 MHz Memory Kit from Patriot comprises a set of two modules each of 4GB capacity with a total of 8GB memory. This memory module kit offers 1866 MHz speed at 1.5V and is XMP 1.3 certified. It utilizes a custom-designed high-performance heat shield for heat dissipation. These Viper 3 modules are tested with Intel 6, 7, and 8 series chipset.