Kingston Hyper X Genesis 16GB Kit (4x4GB Modules) 2133MHz DDR3 Non-ECC CL11 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 2133MHz 240-pin CL11 Unbuffered DIMM Intel XMP Ready