Corsair CMZ4GX3M1A1600C9 Vengeance 4GB (1x4GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V 4GB (1x4GB) DDR3 for AMD and Intel Dual and Triple processors Speed: 1600MHz Timing: 9-9-9-24 Voltage: 1.5V Operates in Single Channel mode when installed individually Vengeance heat spreader for styling and performance Intel XMP (Extreme Memory Profile) Support. Memory Type: DDR3; Speed: 1600MHz Lifetime Warranty