Hyperx fury black 8gb 2 x 4gb memory kit 2133mhz ddr4 non ecc cl14 288 pin dimm 12v unbuffered hyperx hx421c14fbk28 is a kit of two 512m x 64 bit 4gb ddr4 2133 cl14 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 8gb each module has been tested to run at ddr4 2133 at a low latency timing of 14 14 14 at 12v power supply vdd12v typical vddq