CORSAIR high performance Vengeance SODIMM memory module, 4GB (1x4GB) 1600MHz 9-9-9-24, 1.5V, allows you to automatically boost performance of your without bios reconfiguration. Slim and attractive design to ensure physical compatibility with all 2nd Generation Intel Core i5 and i7 notebooks. Each module is built using carefully selected DRAM to allow excellent stability and is backed by Corsair\'s limited lifetime warranty.- 4GB (1x4GB) DDR3 SODIMM for 2nd Generation Intel Core i5 and i7 notebooks. - 1600MHz- 9-9-9-24 latency- 1.5V- Auto-overclocking (no bios configuration required)- Limited Lifetime Warranty