Corsair Dominator 8GB (2x4GB)  DDR3 2133 MHz (PC3 17000) Desktop Memory (CMT8GX3M2B2133C9) Density: 8GB (2x4GB Module) Speed: 2133MHz Timing: 9-11-9-27 Pin Out: 240 Pin Voltage: 1.5V Memory Type: DDR3; Speed: 2133MHz