Dell 16GB PC4-21300 DDR4-2666MHz ECC Registered CL19 288-Pin DIMM 1.2V Dual Rank Memory Module The Dell 370-ADND memory module operates on DDR4 SDRAM technology, representing a significant advancement over its predecessors. DDR4, short for Double Data Rate 4, is the fourth generation of DDR memory and offers notable improvements in speed, efficiency, and overall performance