Which memory type is designed to operate at higher speeds with increased transfer rates compared to its predecessors, featuring lower voltage requirements and higher module density?
DDR4 is the correct choice because it is known for higher speed and efficiency advancements over earlier RAM types like DDR2 and DDR3. DDR4 operates at a lower voltage of 1.2V against DDR3's 1.5V and DDR2's 1.8V, resulting in less power consumption. It also supports larger module capacities which allow for greater RAM density in computer systems.