More memory for more processing power If you're a serious road warrior or you use your notebook for heavy-duty applications like photo and video editing, your notebook should have as much memory as possible. Adding a 4GB, 8GB or 16GB laptop memory upgrade kit will allow you to multitask between more programs at once and load and edit larger files without having to wait for data to buffer to the drive. CORSAIR Vengeance Model - CMSX4GX3M1A1600C9 Details Capacity - 4GB Type - 204-Pin DDR3 SO-DIMM Speed - DDR3 1600 (PC3 12800) CAS Latency - 9 Timing - 9-9-9-24 Voltage - 1.5V Features 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) - All international buyers are responsible for all tax, duties and/or customs fees.