Patriot Viper 4 Patriot Memory Modules Viper 4 Series were designed for real performance. The Viper 4 series, designed for the latest platforms, provides the best performance and stability in the most demanding computer environments. Viper 4 uses a specially designed, high-performance thermal cover that provides excellent heat draining to ensure robust performance even when using the most demanding applications. Memory modules Patriot Memory Viper Series 4, built of top quality materials, are manually tested and verified for system compatibility. Viper 4 will be offered at speeds from 2400 MHz to 3733 MHz and will be ready for XMP 2.0. Hand-tested to ensure quality, the Viper 4 series is covered by a lifetime guarantee.