SK Hynix's GDDR6 at 14Gbps offers up to 672GB/sec

672GB/sec memory bandwidth on 384-bit memory bus is what GDDR6 is capable of, if not more.

@anthony256
Published Tue, May 16 2017 8:50 PM CDT   |   Updated Sat, Aug 8 2020 10:29 AM CDT

We've been reporting about GDDR6 technology for a while now, but SK Hynix detailed its upcoming memory technology in their recent memory catalog, with GDDR6 scheduled for Q4 2017.

SK Hynix's GDDR6 at 14Gbps offers up to 672GB/sec 07 | TweakTown.com
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SK Hynix confirms two different variants of GDDR6, with both offerings being 8Gb (1GB) modules with different frequencies: 12Gbps and 14Gbps. Both modules will use 1.35V.

SK Hynix's GDDR6 at 14Gbps offers up to 672GB/sec 06 | TweakTown.com

I've got some details on what memory bandwidth numbers to expect, which is exciting:

  • GDDR6 @ 12Gbps on 256-bit: 384GB/sec
  • GDDR6 @ 14Gbps on 256-bit: 448GB/sec
  • GDDR6 @ 12Gbps on 384-bit: 576GB/sec
  • GDDR6 @ 14Gbps on 384-bit: 672GB/sec

Let's play with these bandwidth numbers, and use NVIDIA's next-gen Volta graphics cards that are expected late 2017/early 2018. I'm expecting NVIDIA to release a GTX 2080/1180 graphics card using the Volta GPU, and GDDR6 memory on a 256-bit memory bus to replace the GTX 1080 with its GDDR5X on a 256-bit memory bus. This would see the GTX 2080 with 384GB/sec of memory bandwidth, compared to the 320GB/sec available on the GTX 1080 and its GDDR5X @ 10Gbps.

SK Hynix's GDDR6 at 14Gbps offers up to 672GB/sec 08 | TweakTown.com

A possible GeForce GTX 2080/1180 replacement should feature a 384-bit memory bus, and would have 576GB/sec of memory bandwidth with 12Gbps GDDR6, and up to a huge 672GB/sec on 14Gbps GDDR6. This is up from the 480GB/sec available on 10Gbps GDDR5X, and 528GB/sec on 11Gbps GDDR5X.

Anthony is a long time PC enthusiast with a passion of hate for games built around consoles. FPS gaming since the pre-Quake days, where you were insulted if you used a mouse to aim, he has been addicted to gaming and hardware ever since. Working in IT retail for 10 years gave him great experience with custom-built PCs. His addiction to GPU tech is unwavering.

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