Kingston HyperX Beast 16 GB Kit (2x8 GB) 2133MHz DDR3 PC3-17000 CL11 DIMM XMP Desktop Memory KHX21C11T3K2/16X 16GB Kit (2x8GB) DDR3 XMP Desktop Memory Unique black heatspreader 100-percent factory tested XMP profiles - factory configured for best maximum performance Non-ECC 2133MHz 240-pin Unbuffered DIMM