8GB G.Skill Ripjaws DDR3 2133MHz SO-DIMM Low-voltage 1.35V laptop memory module CL11 8GB G.Skill Ripjaws DDR3 Laptop upgrade memory module Low-voltage DDR3 memory, 1.35V 204 pins - 2133MHz PC3-17000 SO-DIMM Timings of CL11 (11-11-11-31) at 1.35V Designed for the latest Intel 3rd and 4th Gen Processors