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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.


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[edit]

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]

See also[edit]


  2. ^ a b c d Shilov, Anton (30 April 2017). "SK Hynix to Ship GDDR6 for Graphics Cards by Early 2018". Anandtech. Retrieved 2 May 2017.
  3. ^ a b 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. ^ a b Walton, Mark (23 August 2016). "HBM3: Cheaper, up to 64GB on-package, and terabytes-per-second bandwidth". Ars Technica. Retrieved 3 February 2017.
  5. ^ a b 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. ^ a b 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. ^
  15. ^
  16. ^
  17. ^ Mujtaba, Hassan (14 August 2018). "Samsung GDDR6 Memory Powers NVIDIA's Turing GPU Based Quadro RTX Cards". 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. ^,39603.html