Crucial CT16G4WFD8266is a 1Gx72-bit (1 x 16GB) DDR4-2666 CL19 ECC Unbuffered memory module, based on eighteen 1G x 8-bit DDR4 FBGA components. The SPD is programmed to JEDEC standard latency DDR4-2666 timing of 19-19-19 at 1.2V. This 288-pin DIMM uses gold contact fingers.