Kingston Technology 2133MHz DDR3 Non-ECC CL11 DIMM XMP 16 DDR3 2133 Kingston HyperX Predator 16GB Kit HX321C11T2K2/16 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 2133MHz 240-pin CL11 Unbuffered DIMM Backed by a lifetime warranty and free technical support