Corsair 4GB DDR3 SDRAM Memory Module - For Notebook, Desktop PC - 4 GB (1 x 4GB) - DDR3-1066/PC3-8500 DDR3 SDRAM - 1066 MHz - Non-ECC - Unbuffered - 204-pin - SoDIMM - Lifetime Warranty

1066 MHz of memory speed with Unbuffered signal makes your computer great at multitasking SoDIMM 4 GB memory smoothly executes complex apps and games 204-pin-pin DDR3-1066/PC3-8500 operates at an effective bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation