Patriot Viper Elite Series DDR4 4GB 2666 MHz (Black/Grey). Patriots Viper Elite memory modules are designed with true performance in mind. Built for the latest Intel and AMD platforms, the Viper Elite series provides the best performance and stability for the most demanding computer environments. The Viper Elite 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, Patriots Viper Elite series memory modules are hand tested and validated for system compatibility. Patriots Viper Elite series is available in both single module and dual kits with capacities from 4GB to 32GB, and speeds from 2133MHz to 2800MHz in red and grey heat shields. Hand tested for quality assurance the Viper Elite series is backed by a limited lifetime warranty. FEATURES: Series: Viper Elite Edition: Black Sides/ Gray Top Compatibility: tested across latest Intel and AMD platforms Feature Overclock: XMP 2.0 support for automatic overclocking Aluminum heat spreader for faster heat dissipation and cooler operation Limited lifetime warranty. SPECIFICATIONS: Capacity: 4GB Base Frequency: PC4-17000 (2133MHz) Base Timings: 15-15-15-36 Tested Frequency: PC4-21300 (2666MHz) Tested Timings: 16-18-18-36 Voltage: 1.2V Format: NON-ECC Unbuffered DIMM Pin Out: 288-Pin Heat spreader: Anodized Aluminum.