Updated: 08/31/2020 by Computer Hope

Short for double data rate four, DDR4 is a type of system memory known as SDRAM (synchronous dynamic random-access memory) and was released in September 2014 as the successor to DDR3. DDR4 has bus clock speeds that range from 800 to 1600 MHz and range in storage capacity from 4 to 128 GB per DIMM (dual in-line memory module). DDR4 is also more efficient at 1.2 V compared to DDR3's 1.5 to 1.65 V range.


These memory chips can only be installed on a motherboard that supports DDR4 memory and are not backward compatible with DDR3 memory slots.

Bus, Capacity, Computer abbreviations, DDR, DDR2, DDR3, DDR5, Memory terms, MHz