Corsair CMX8GX3M2A1600C11 XMS3 8GB (2x4GB) DDR3 1600 MHZ (PC3 12800) Desktop Memory 1.5V Density: 8GB (2x4GB Module) Speed: 1600MHz Timing: 11-11-11-30 Voltage: 1.5V Format: DIMM Pin Out: 240 Pin Limited Lifetime Warranty. Memory Type: DDR3; Speed: 1600MHz