Kingston HyperX Fury 4GB DDR3 SDRAM Memory Module - 4 GB (1 x 4GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz - CL10 - 1.50 V - Non-ECC - Unbuffered - 240-pin - DIMM - Lifetime Warranty

No matter how heavy and numerous the applications that you are using, 1866 MHz memory speed with Unbuffered signal will run them smoothly 4 GB of memory to refine your computers performance DDR3 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate