Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.
DDR5 SDRAM
| Type of RAM | |
 | |
| Developer | JEDEC |
|---|---|
| Type | Synchronous dynamic random-access memory |
| Generation | 5th generation |
| Release date | July 14, 2020[2] |
| Standards |
|
| Clock rate | 2,000–4,400 MHz |
| Cycle time | 16n bank structure |
| Prefetch buffer | 4n |
| Transfer rate | 4.0–8.8 GT/s |
| Bandwidth | 32.0–70.4 GB/s[a] |
| Voltage | 1.1 V nominal (actual levels are regulated by on-the-module regulators) |
| Predecessor | DDR4 SDRAM (2014) |
| Successor | DDR6 SDRAM |
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.[5] The standard, originally targeted for 2018,[6] was released on July 14, 2020.[2]
A new feature called Decision Feedback Equalization (DFE) enables input/output (I/O) speed scalability for higher bandwidth and performance improvement. DDR5 has about the same 14 ns latency as DDR4 and DDR3.[7] DDR5 octuples the maximum DIMM capacity from 64 GB to 512 GB.[8][3] DDR5 also has higher frequencies than DDR4, up to 8GT/s which translates into 64 GB/s (8 gigatransfers/second × 64-bits/module / 8 bits/byte = 64 GB/s) of bandwidth per DIMM.
Rambus announced a working DDR5 dual in-line memory module (DIMM) in September 2017.[9][10] On November 15, 2018, SK Hynix announced completion of its first DDR5 RAM chip; running at 5.2 GT/s at 1.1 V.[11] In February 2019, SK Hynix announced a 6.4 GT/s chip, the highest speed specified by the preliminary DDR5 standard.[12] The first production DDR5 DRAM chip was officially launched by SK Hynix on October 6, 2020.[13][14]
The separate JEDEC standard Low Power Double Data Rate 5 (LPDDR5), intended for laptops and smartphones, was released in February 2019.[15]
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.[10][failed verification][16]
In 2024 first CU-DIMM modules were introduced together with Intel Arrow Lake and AMD's new AM5 socket (and all compatible cpu).
- ^ Here, K, M, G, or T refer to the binary prefixes based on powers of 1024.
- ^ a b Smith, Ryan (July 14, 2020). "DDR5 Memory Specification Released: Setting the Stage for DDR5-6400 And Beyond". AnandTech. Retrieved July 15, 2020.
- ^ a b "DDR5 Memory Standard: An introduction to the next generation of DRAM module technology". Kingston Technology. January 2024. Retrieved February 19, 2023.
- ^ DDR5 SDRAM Product Core (PDF) (Data Sheet). Micron. October 2022. CCM005-1684161373-23. Archived from the original (PDF) on June 21, 2023. Retrieved May 15, 2023.
- ^ Manion, Wayne (March 31, 2017). "DDR5 will boost bandwidth and lower power consumption". Tech Report. Retrieved April 1, 2017.
- ^ Cunningham, Andrew (March 31, 2017). "Next-generation DDR5 RAM will double the speed of DDR4 in 2018". Ars Technica. Retrieved January 15, 2018.
- ^ Dr. Ian Cutress (October 6, 2020). "Insights into DDR5 Sub-timings and Latencies". AnandTech.
In terms of single access latency, we are ultimately not going to be any faster than we were by the end of the DDR3 era. DDR3-1866 at CL13 was already at 13.93 nanoseconds.
- ^ "DDR5 vs DDR4 – All the Design Challenges & Advantages".
- ^ Lilly, Paul (September 22, 2017). "DDR5 memory is twice as fast as DDR4 and slated for 2019". PC Gamer. Retrieved January 15, 2018.
- ^ a b Tyson, Mark (September 22, 2017). "Rambus announces industry's first fully functional DDR5 DIMM". hexus.net.
- ^ "SK Hynix Inc. Announces 1Ynm 16Gb DDR5 DRAM" (Press release). SK Hynix. November 15, 2018. Archived from the original on December 31, 2018. Retrieved November 18, 2018.
The new 16Gb DDR5 DRAM supports a data transfer rate of 5200Mbps
- ^ Shilov, Anton. "SK Hynix Details DDR5-6400". anandtech.com.
- ^ "SK hynix Launches World's First DDR5 DRAM". hpcwire.com.
- ^ "SK hynix: DDR5 DRAM Launches". businesskorea.co.kr. October 7, 2020.
- ^ "JEDEC Updates Standard for Low Power Memory Devices: LPDDR5" (Press release). JEDEC. February 19, 2019.
- ^ Liu, Zhiye (July 15, 2020). "DDR5 Specification Released: Fast RAM With Built-In Voltage Regulators". Tom's Hardware.
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
Previous Page Next Page
