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The black/red Viper 4 DDR4 PC4-22400 16GB (4 x 4GB) 2800 MHz UDIMM Kit from Patriot comprises a set of four modules each of 4GB capacity, with a total of 16GB memory. These modules run on 1.2V and offer 2800 MHz clock speed. The Viper 4 utilizes a custom-designed, high performance heat shield for an enhanced heat dissipation to ensure an optimal performance when using taxing applications.