|Type of RAM|
|Type||Synchronous dynamic random-access memory|
DDR5 SDRAM is the official abbreviation for Double Data Rate 5 Synchronous Dynamic Random-Access Memory. Compared to its predecessor DDR4 SDRAM, DDR5 is planned to reduce power consumption, while doubling bandwidth. As of September 2019, the standard is still being finalized by JEDEC, and is expected to be published in 2020 (2018 had previously been the release target). Some companies were planning to bring the first products to market by the end of 2019. The independent JEDEC standard LP-DDR5 (Low Power Double Data Rate 5), intended for laptops and smartphones, was released in February 2019.
Rambus announced a working DDR5 DIMM in September 2017. On November 15, 2018, SK Hynix announced completion of its first DDR5 RAM chip; it runs at 5200 MT/s at 1.1 volts. In February 2019, SK Hynix announced a 6400 MT/s chip, the highest speed officially allowed by the preliminary DDR5 standard.
Compared to DDR4, DDR5 further reduces memory module voltage to 1.1 V, thus reducing power consumption. DDR5 modules can incorporate on-board voltage regulators in order to reach higher speeds; as this will increase cost it is expected to be implemented only on server-grade and possibly high-end consumer modules. DDR5 supports a speed of 51.2 GB/s per module and 2 memory channels per module.
There is a general expectation that most use-cases which currently use DDR4 will eventually migrate to DDR5. To be usable in desktops and laptops, the integrated memory controllers of Intel's and AMD's CPUs will have to support it; as of September 2019, there has not been any official announcements of support from either, but a leaked slide shows planned DDR5 support on Intel's 2021 Sapphire Rapids microarchitecture. According to AMD's Forrest Norrod, AMD's mid-2020 Zen 3 based third generation Epyc CPUs will still use DDR4.
The JEDEC standard for the low power counterpart to DDR5, LPDDR5, was published on 19 February 2019.
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