8GB G.Skill DDR3-2133 RipjawsX Series for the Intel Z68/P67 platforms. PC3-17000 2133MHz with timings of 11-11-11-30 (CL11). 1.5-1.6V dual channel kit, 2x4GB modules, 240 pins. XMP Ready, equipped with new style red RipjawsX Series heatsinks.