CORSAIR XMS3 DHX 4GB ( 2 X 2GB ) PC3-12800 1600MHz 240-pin DDR3 CL9 Dual Channel Desktop Memory Kit - TW3X4G1600C9DHX Memory Size: 2 x 2048MB Memory Speed: 1600Mhz PC12800 Memory Type: Dual Channel DDR3 Memory CAS Latency: 9-9-9-24 Keyring Pins: 240