Hyperx 64gb 8x8gb 2800mhz ddr4 cl14 dimm memory hyperx hx428c14sbk864 is a kit of eight 1g x 64 bit 8gb ddr4 2800 cl14 sdram synchronous dram 2rx8 memory modules based on sixteen 512m x 8 bit fbga components per module total kit capacity is 64gb each module supports intelreg xmp extreme memory profiles each module has been tested to run at ddr4 2800 at a low latency timing of 14 15 15 at 135v the spds are programmed to jedec standard latency ddr4 2133 timing of 15 15 15 at 12