Crucial CT2K32G4RFD4213 is a kit of two 4Gx72-bit (32GB) DDR4-2133 CL15 SDRAM registered w/ parity, 2Rx4, ECC, memory module, based on thirty-six 2G x 4-bit FBGA components. Total kit capacity is 64GB. The SPD is programmed to JEDEC standard latency DDR4-2133 timing of 15-15-15 at 1.2V. Each 288-pin DIMM uses gold contact fingers.