DDR4 SDRAM

Double Data Rate 4 Synchronous Dynamic Random-Access Memory (DDR4 SDRAM) is a type of synchronous dynamic random-access memory with a high bandwidth ("double data rate") interface.

This article is about DDR4 SDRAM. For graphics DDR4, see GDDR4 SDRAM. For the video game, see Dance Dance Revolution 4thMix.
DDR4 SDRAM
Double Data Rate 4 Synchronous Dynamic Random-Access Memory
Type of RAM
16 GiB DDR4-2666 1.2 V UDIMM
DeveloperJEDEC
TypeSynchronous dynamic random-access memory (SDRAM)
Generation4th generation
Release date2014 (2014)
Standards
  • DDR4-1600 (PC4-12800)
  • DDR4-1866 (PC4-14900)
  • DDR4-2133 (PC4-17000)
  • DDR4-2400 (PC4-19200)
  • DDR4-2666 (PC4-21333)
  • DDR4-2933 (PC4-23466)
  • DDR4-3200 (PC4-25600)
Clock rate800–1600 MHz
Voltage Reference 1.2 V
PredecessorDDR3 SDRAM (2007)
SuccessorDDR5 SDRAM (2020)

Released to the market in 2014, it is a variant 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 voltage and physical interface, besides other factors.

DDR4 SDRAM was released to the public market in Q2 2014, focusing on ECC memory, while the non-ECC DDR4 modules became available in Q3 2014, accompanying the launch of Haswell-E processors that require DDR4 memory.

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