Corsair Vengeance 8GB (2x4GB)  DDR3 1866 MHz (PC3 15000) Laptop Memory (CMSX8GX3M2A1866C10) 8GB (2x4GB) DDR3 SODIMM kit for 2nd Generation Intel Core i5 and i7 notebooks Speed: 1866MHz Timing: 10-10-10-32 Pin Out: 204 Pin, Voltage: 1.5V Density: 8GB (2x4GB Module), Limited Lifetime Warranty