Corsair CMSX8GX3M2A1600C9 Vengeance 8GB (2x4GB) DDR3 1600 MHz (PC3 12800) Laptop Memory 1.5V 8GB (2x4GB) DDR3 SODIMM kit for 2nd Generation Intel Core i5 and i7 notebooks Speed: 1600MHz , Timing: 9-9-9-24, Pin Out: 204 Pin , Voltage: 1.5V , Density: 8GB (2x4GB Module) Limited Lifetime Warranty Memory Configuration SODIMM,Memory Series :Vengeance ,Memory Type:DDR3 ,Package Memory Format:SODIMM Kindly refer product description for compatibility information Memory Type: DDR3; Speed: 1600MHz