Corsair XMS3 4GB (2x2GB) DDR3 1333 MHz (PC3 10666) Desktop Memory 1.5V Memory Size: 2 x 2048MB Memory Speed: PC10600 Memory Type: DDR3 Memory CAS Latency: 9-9-9-24 It features Pins: 240 Memory Type: DDR3; Speed: 1333MHz