In computing, DDR4 SDRAM, an abbreviation for double data rate fourth-generation synchronous dynamic random-access memory, is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth ("double data rate") interface.
Released to the market in 2014, it is one of the latest variants of dynamic random-access memory (DRAM), of which some have been in use since the early 1970s, and a higher-speed successor to the DDR2 and DDR3 technologies.
DDR4 is not compatible with any earlier type of random-access memory (RAM) due to different signaling voltages, physical interface and other factors.
