Hyperx hx421c13pbk416 is a kit of four 512m x 64 bit 4gb ddr4 2133 cl13 sdram synchronous dram 1rx8 memory module based on eight 512m x 8 bit fbga components per module each module kit supports intel extreme memory profiles intel xmp 20 total kit capacity is 16gb each module has been tested to run at ddr4 2133 at a low latency timing of 13 13 13 at 12v the spds are programmed to jedec standard latency ddr4 2133 timing of 15 15 15 at 12v each 288 pin dimm uses gold contact fi