RAM Corsair SO-DIMM 4GB DDR3 1066MHz CL7 for Apple :High-quality and reliable memory module designed for modern laptops Apple SoDIMM slot for DDR3 memory. This is the latest generation module called DDR3 compared to previously used modules provides a higher frequency, resulting in increased performance and reduce power consumption. The timing module is CL7 and corresponding certification PC8500, which corresponds to the maximum operating frequency of 1066 MHz. This makes it a great choice if you need to expand the RAM in your laptop. Especially, if you require high performance as the programming, working with video or gaming.Specifications: Designed for: Apple Laptops (selected models)Type: DDR3Capacity: 4 gigabytesMaximum operating frequency: 1066 MHzTiming: CL7Certification: PC8500Interface: 204-pin