G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL8D-8GBXM Memory Type: DDR3Capacity: 8GB (4GBx2) Multi-Channel Kit: Dual Channel Kit Tested Speed: 1866 MHz Tested Latency: 8-9-9-24-2N Tested Voltage:1.50 v