Patriot Viper 4 Blackout Series DDR4 16GB (2 x 8GB) 4000MHz Kit. Patriot Viper 4 Blackout Series memory modules are designed with both true performance and sleek style in mind. Built for the latest platforms, the Viper 4 Blackout Edition Series provides top quality performance and matches perfectly with almost any PC build. The Viper 4 Blackout Series utilizes a custom, newly designed, high performance black 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 Viper 4 Blackout Series memory modules are hand tested and validated for system compatibility. The Patriot Viper 4 Blackout Series is XMP 2.0 ready, high performance memory and compatible with the latest AMD and Intel platforms. Hand tested for quality assurance, the Viper 4 Blackout Edition series is backed by a limited lifetime warranty.FEATURES: Series: Viper 4 Blackout Edition: Black Sides / Black Top Compatibility: Tested across latest Intel and AMD series motherboards for reliably fast performance Feature Overclock: XMP 2.0 support for automatic overclocking Aluminum heat spreader for faster heat dissipation and cooler operation Limited lifetime warranty. SPECIFICATIONS: Capacity: 16GB (2 x 8GB) Base Frequency: PC4-17000 (2133MHz) Base Timings: 15-15-15-36 Tested Frequency Profile 1: PC4-32000 (4000MHz) Tested Timings: 19-21-21-41 Tested Voltage for Profile 1: 1.35V Format: NON-ECC Unbuffered DIMM Pin Out: 288-Pin.