EDGE PE223953 4GB DDR3 SDRAM Memory Module - For Desktop PC - 4 GB (1 x 4GB) - DDR3-1333/PC3-10600 DDR3 SDRAM - 1333 MHz - Non-ECC - Unbuffered - 240-pin - DIMM - Lifetime Warranty

Up to 1333 MHz speed with Unbuffered signal for playing the latest games and using heavy software 4 GB of memory to refine your computers performance 240-pin-pin DDR3-1333/PC3-10600 interface synchronizes electrical and clock signals for an efficient data transfer rate