G.Skill Ripjaws 4 F4-2133C15Q-16GRB (4x4GB) DDR4, 2133MHz DDR4 1.2V, Unbuffered, 15-15-15-35-2N, backed by a lifetime G.Skill warranty. G.SKILL DDR4 memory kits are validated for compatibility with most DDR4 platforms under a series of rigorous tests in quad channel memory operations. It’s guaranteed to provide the best-in-class performance, compatibility, and stability with the widest range of motherboards.