Axiom 8GB DDR3-1066 SODIMM Kit (2 x 4GB) for Apple # MC557G/A - 8 GB (2 x 4 GB) - DDR3 SDRAM - 1066 MHz DDR3-1066/PC3-8500 - 204-pin - SoDIMM

1066 MHz of memory speed makes your computer perform like an athlete 8 GB of memory makes a perfect symmetry with your latest model processor and boosts up your computers performance 204-pin-pin DDR3-1066/PC3-8500 interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance