4GB 204pin PC3-10600 CL9 16c 256x8 DDR3-1333 2Rx8 1.5V SODIMM 4GB 204p PC3-10600 CL9 16c 256x8 DDR3-1333 2Rx8 1.5V SODIMM DELL, ALIENWARE, IBM/LENOVO, HP, TOSHIBA, PANASONIC, APPLE LAPTOP MEMORY Check if your machine takes specs above. 100% Compatible Lifetime Warranty.