Kingston 4gb 2133mhz ddr4 ecc cl15 dimm 1rx8 memory description this document describes valuerams kvr21e15s84 is a 512m x 72 bit 4gb ddr4 2133 cl15 sdram synchronous dram 1rx8 ecc memory module based on nine 512m x 8 bit fbga components the spd is programmed to jedec standard latency ddr4 2133 timing of 15 15 15 at 12v each 288 pin dimm uses gold contact fingers the electrical and mechanical specifications are as follows features power supply vdd12v typical vddq 12v