Kingston Hyper X Genesis 16GB Kit (4x4GB Modules) 1866MHz DDR3 Non-ECC CL9 DIMM XMP Desktop Memory 16GB Kit (4x4GB 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 1866MHz 240-pin CL9 Unbuffered DIMM Intel XMP Ready