Crucial CT16G4S266M is a 2Gx64-bit (16GB) DDR4-2666 CL19 SDRAM 2Rx8, non-ECC memory module, based on eight 2G 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 260-pin DIMM uses gold contact fingers.