Kingston HyperX Predator 16GB Kit (4x4GB) 1866MHz DDR3 Non-ECC CL9 DIMM XMP Desktop Memory (HX318C9T2K4/16) 16GB Kit of DDR3 Non-ECC 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 Backed by a lifetime warranty and free technical support