G.Skill GSKILL Ripjaws X F3-17000CL11D-8GBXL 8GB (2x4GB) DDR3-2133Mhz Desktop RAM Memory Capacity: 8GB (2 x 4GB) Speed: DDR3 2133 (PC3 17000) CAS Latency: 11-11-11-30-2N Registered/Unbuffered: Unbuffered Voltage: 1.5; Type: 240-pin DIMM