EDGE PE22645902 8GB DDR3 SDRAM Memory Module - For Notebook - 8 GB (2 x 4GB) - DDR3-1066/PC3-8500 DDR3 SDRAM - 1066 MHz - Non-ECC - Unbuffered - 204-pin - SoDIMM - Lifetime Warranty

1066 MHz of memory speed makes your computer great at multitasking 8 GB memory allows you to have more programs open at a time 204-pin-pin DDR3-1066/PC3-8500 interface synchronizes electrical and clock signals for an efficient data transfer rate