Kingston HyperX Plug n Play 8GB Kit 2133MHz DDR3 PC3-1700 Non-ECC CL12 SODIMM Notebook Memory KHX21S12P1K2/8 8GB Kit (2x4GB Modules) of DDR3 Desktop Memory Utilizes HyperX module with faster latency timing for higher performance and speed Specifically designed and tested for compatibility in various makes and models of desktop computers From the industry leader in PC memory Non-ECC 2133MHz 204-Pin CL12 Unbuffered SODIMM