Boost your laptop's performance by installing this Corsair Dual Channel DDR3 204-Pin DDR3 Apple Laptop SO-DIMM Memory Module. This module comes with two 4GB SO-DIMMs to provide 8GB of system memory. That will allow you to run memory-intensive programs without bogging down your system. Featuring a speed of 1066MHz, this module can boost the performance of your operating software and other applications. This 8GB Dual Channel Kit is tested at Apple's compatibility lab to ensure that it will function with all current products that have official Apple support for 4GB SO-DIMMs. Recommended for Mac laptops, this memory module includes 1.5V of power, which can further enhance the performance of your computer.