Ddr5 Sdram

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Double Data Rate 5 Synchronous Dynamic Random-Access Memory ( DDR5 SDRAM ) is a type of synchronous dynamic random-access memory. Compared to its predecessor DDR4 SDRAM, DDR5 was planned to reduce power consumption, while doubling bandwidth. The standard, originally targeted for 2018, was released on July 14, 2020.

A new feature called Decision Feedback Equalization (DFE) enables I/O speed scalability for higher bandwidth and performance improvement. DDR5 supports more bandwidth than its predecessor, DDR4, with 4.8 gigabits per second possible, but not shipping at launch. DDR5 has about the same latency as DDR4 and DDR3. DDR5 octuples the maximum DIMM capacity from 64 GB to 512 GB. DDR5 also has higher frequencies than DDR4.

Rambus announced a working DDR5 DIMM in September 2017. On November 15, 2018, SK Hynix announced completion of its first DDR5 RAM chip; running at 5200 MT/s at 1.1 V. In February 2019, SK Hynix announced a 6400 MT/s chip, the highest speed specified by the preliminary DDR5 standard. Some companies were planning to bring the first products to market by the end of 2019. The world's first DDR5 DRAM chip was officially launched by SK Hynix on October 6, 2020.

The separate JEDEC standard LPDDR5 (Low Power Double Data Rate 5), intended for laptops and smartphones, was released in February 2019.

Compared to DDR4, DDR5 further reduces memory voltage to 1.1 V, thus reducing power consumption. DDR5 modules incorporate on-board voltage regulators in order to reach higher speeds. DDR5 supports a speed of 51.2 GB/s per module and two memory channels per module.

There is a general expectation that most use-cases that currently use DDR4 will eventually migrate to DDR5.