Patriot Viper Elite Series DDR4 16GB (2x8GB) 2666MHz PC4-21300 Dual Memory Kit (Black/Grey) DDR4 Memory capacity: 16GB Voltage: 1.2V; tested frequency: PC4-21300 (2666MHz), tested timings: 16-18-18-36 Feature Overclock: XMP 2.0 support for automatic overclocking Limited lifetime warranty Compatible with the latest Intel and AMD DDR4 platforms