Corsair Single Laptop Memory Module is a 8GB memory card with 1600MHz memory speed. It has 1.35V operation voltage, compared to 1.5V of standard DDR3 voltage, for less power consumption, longer battery life and reduced heat generation.
Adding more memory allows your system to run more applications at once, and makes switching between applications faster and smoother. Your programs can open more files at once and store more data temporarily in fast DRAM, instead of on the hard drive. In short, your system will be more responsive and achieve its true performance potential.