GDDR6 SDRAM

GDDR6, an abbreviation for graphics double data rate type six synchronous dynamic random-access memory, is a type of synchronous graphics random-access memory (SGRAM) with a high bandwidth ("double data rate") interface designed for use in graphics cards, game consoles, and high-performance computing. It is a type of GDDR SDRAM (graphics DDR SDRAM), and is the successor to GDDR5.

This article is about DDR graphics RAM (SDRAM). For non-graphics (dynamic) DDR memory, see SDRAM.

Overview

The finalised specification was published by JEDEC in July 2017.[1] GDDR6 offers increased per-pin bandwidth (up to 16 Gbit/s[2]) and lower operating voltages (1.35 V[3]), increasing performance and decreasing power consumption relative to GDDR5X.[4][5]

Commercial implementation

At Hot Chips 2016, Samsung announced GDDR6 as the successor of GDDR5X.[4][5] Samsung later announced that the first products would be 16 Gbit/s, 1.35 V chips.[6][7] In January 2018, Samsung began mass production of 16 Gb (2 GB) GDDR6 chips, fabricated on a 10 nm class FinFET process and with a data rate of up to 18 Gbps per pin.[8][7][9]

In February 2017, Micron Technology announced it would release its own GDDR6 products by early 2018.[10] Micron began mass production of 8 Gb chips in June 2018.[11]

SK Hynix announced its GDDR6 products would be released in early 2018.[12][2] SK Hynix announced in April 2017 that its GDDR6 chips would be produced on a 21 nm process and be 10% lower voltage than GDDR5.[2] The SK Hynix chips were expected to have a transfer rate of 14–16 Gbit/s.[3] The first graphics cards to use SK Hynix's GDDR6 RAM were expected to use 12 GB of RAM with a 384-bit memory bus, yielding a bandwidth of 768 GB/s.[2] SK Hynix began mass production in February 2018, with 8 Gbit chips and a data rate of 14 Gbps per pin.[13]

Nvidia officially announced the first consumer graphics cards using GDDR6, the Turing-based GeForce RTX 2080 Ti, RTX 2080 & RTX 2070 on August 20, 2018,[14] RTX 2060 on January 6, 2019[15] and GTX 1660 Ti on February 22, 2019.[16] GDDR6 memory from Samsung Electronics is also used for the Turing-based Quadro RTX series.[17] The RTX 20 series initially launched with Micron memory chips, before switching to Samsung chips by November 2018.[18]

AMD officially announced the Radeon RX 5700, 5700 XT, and 5700 XT 50th Anniversary Edition on June 10, 2019. These Navi 10[19] GPUs utilize 8 GB of GDDR6 memory.[20]

gollark: Really? "Smart" lightbulbs?
gollark: 20 seconds ≈ forever.
gollark: My computer's PSU is 450W, sum of part TDPs or something is 227W, actual draw I never checked.
gollark: LEDs are, what, 10W or so at most for a lot of light.
gollark: The real power draw will be the computer doing motion detection.

See also
  • List of device bit rates

References
  1. GRAPHICS DOUBLE DATA RATE 6 (GDDR6) SGRAM STANDARD
  2. Shilov, Anton (30 April 2017). "SK Hynix to Ship GDDR6 for Graphics Cards by Early 2018". Anandtech. Retrieved 2 May 2017.
  3. Born, Eric (16 May 2017). "SK Hynix's first GDDR6 RAM will initially top out at 14 Gbps". Tech Report. Retrieved 16 May 2017.
  4. Walton, Mark (23 August 2016). "HBM3: Cheaper, up to 64GB on-package, and terabytes-per-second bandwidth". Ars Technica. Retrieved 3 February 2017.
  5. Ferriera, Bruno (23 August 2016). "HBM3 and GDDR6 emerge fresh from the oven of Hot Chips". Tech Report. Retrieved 3 February 2017.
  6. Shilov, Anton (14 November 2017). "Samsung Preannounces 16 Gbps GDDR6 Chips for Next-Gen Graphics Cards". Anandtech. Retrieved 14 November 2017.
  7. Killian, Zak (18 January 2018). "Samsung fires up its foundries for mass production of GDDR6 memory". Tech Report. Retrieved 18 January 2018.
  8. "Samsung Electronics Starts Producing Industry's First 16-Gigabit GDDR6 for Advanced Graphics Systems". Samsung. January 18, 2018. Retrieved 15 July 2019.
  9. "Samsung Begins Producing The Fastest GDDR6 Memory In The World". Wccftech. 18 January 2018. Retrieved 16 July 2019.
  10. Tallis, Billy (3 February 2017). "Micron 2017 Roadmap Detailed: 64-Layer 3D NAND, GDDR6 Getting Closer, & CEO Retiring". Anandtech. Retrieved 7 February 2017.
  11. "Micron Begins Volume Production of GDDR6 High Performance Memory". Micron Technology. June 25, 2018. Retrieved 14 July 2019.
  12. "Archived copy". Archived from the original on 2017-04-24. Retrieved 2017-05-11.CS1 maint: archived copy as title (link)
  13. Shilov, Anton (February 6, 2018). "SK Hynix Lists GDDR6 Memory as 'Available Now', Publishes Final Specs". AnandTech. Retrieved 14 July 2019.
  14. https://nvidianews.nvidia.com/news/10-years-in-the-making-nvidia-brings-real-time-ray-tracing-to-gamers-with-geforce-rtx
  15. https://nvidianews.nvidia.com/news/nvidia-geforce-rtx-2060-is-here-next-gen-gaming-takes-off
  16. https://nvidianews.nvidia.com/news/new-geforce-gtx-1660-ti-delivers-great-performance-leap-for-every-gamer-starting-at-279
  17. Mujtaba, Hassan (14 August 2018). "Samsung GDDR6 Memory Powers NVIDIA's Turing GPU Based Quadro RTX Cards". wccftech.com. Retrieved 19 June 2019.
  18. Maislinger, Florian (21 November 2018). "Faulty RTX 2080 Ti: Nvidia switches from Micron to Samsung for GDDR6 memory". PC Builder's Club. Retrieved 15 July 2019.
  19. AMD RX Vega series
  20. https://www.tomshardware.com/news/amd-radeon-rx-5700-xt-50th-anniversary-edition,39603.html
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