16GB G.Skill DDR3 PC3-17000 RipjawsZ Series for Intel X79 (9-11-10-28) Quad Channel kit 4x4GB 16GB G.Skill RipjawsZ Series Quad channel kit 4x4GB DDR3 2133MHz PC3-17000 CL9 (9-11-10-28) 1.65V