Corsair 4GB DDR3 SDRAM Memory Module - For Notebook, Desktop PC - 4 GB (1 x 4GB) - DDR3-1333/PC3-10666 DDR3 SDRAM - 1333 MHz - CL9 - 204-pin - SoDIMM - Lifetime Warranty

No matter how heavy and numerous the applications that you are using, 1333 MHz memory speed will run them smoothly 4 GB of memory to refine your computers performance 204-pin-pin DDR3-1333/PC3-10666 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