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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 computation.


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] with production beginning in January 2018.[6] Samsung later announced that the first products would be 16 Gbit/s, 1.35 V chips.[7][6]

In February 2017, Micron announced it would release its own GDDR6 products by the end of 2017 or early 2018.[8]

SK Hynix announced its GDDR6 products would be released in early 2018.[9][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 are expected to be 8 Gb[clarification needed] per chip with a transfer rate of up to 16 Gbit/s. However, SK Hynix's first GDDR6 products are limited to 14 Gbit/s.[3] The first graphics cards to use SK Hynix's GDDR6 RAM are expected to use 12 GB of RAM with a 384-bit memory bus, yielding a bandwidth of 768 GB/s.[2]

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[10], RTX 2060 on January 6, 2019[11] and GTX 1660 Ti on February 22, 2019.[12]

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. ^ a b Killian, Zak (18 January 2018). "Samsung fires up its foundries for mass production of GDDR6 memory". Tech Report. Retrieved 18 January 2018.
  7. ^ Shilov, Anton (14 November 2017). "Samsung Preannounces 16 Gbps GDDR6 Chips for Next-Gen Graphics Cards". Anandtech. Retrieved 14 November 2017.
  8. ^ Tallis, Billy (3 February 2017). "Micron 2017 Roadmap Detailed: 64-Layer 3D NAND, GDDR6 Getting Closer, & CEO Retiring". Anandtech. Retrieved 7 February 2017.
  9. ^ "Archived copy". Archived from the original on 2017-04-24. Retrieved 2017-05-11.CS1 maint: Archived copy as title (link)
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