G.SKILL 16GB (4 x 4GB) Ripjaws Z Series DDR3 2133 (PC3 17000) 240-Pin Desktop Memory Model F3-17000CL11Q-16GBZL 16GB G.Skill RipjawsZ Series Quad channel kit 4x4GB DDR3 2133MHz PC3-17000 CL11 (11-11-11-30) 1.6V