Patriot 8GB(2x4GB) Viper Series DDR3 1600 (PC3 12800) CL9/ Voltage 1.35V Laptop Memory - PV38G160LC9SK Viper SODIMM 204-Pin NON-ECC SODIMM 1.35V PC3-12800 (1600MHz) 9-9-9-24 Viper Performance SODIMM 3rd and 4th generation Intel Core I5 and I7 processors XMP 1.3 Viper Performance SODIMM 9-9-9-24 Viper Performance Memory