Hyperx savage black 4gb ddr4 2133mhz memory hyperx hx421c13sb4 is a 512m x 64 bit 4gb ddr4 2133 cl13 sdram synchronous dram 1rx8 memory module based on eight 512m x 8 bit fbga components each module supports intelreg xmp extreme memory profiles 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 fingers the jedec standa