SK Hynix teases HBM3 with 12-Hi 24GB stack layout, 6400Mbps speeds

SK Hynix shows off next-gen 24GB HBM3 6.4Gbps memory at OCP Summit 2021, which offers up to 819GB/sec bandwidth per stack.

@anthony256
Published Fri, Nov 12 2021 8:43 PM CST

The world of consumer graphics cards shifted away from HBM to GDDR6 pretty quickly, with flagship NVIDIA GeForce RTX 30 series GPUs rocking ultra-fast Micron GDDR6X memory. But the world of HBM didn't stop, and now SK Hynix is showing off their 24GB HBM3 memory clocked at 6.4Gbps.

SK Hynix teases HBM3 with 12-Hi 24GB stack layout, 6400Mbps speeds 03 | TweakTown.com
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During the recent OCP Summit 2021, ServeTheHome spotted some of that delicious new HBM3 memory from SK Hynix and snapped a photo of it. It was pretty fast of SK Hynix to display it since the company only announced its new HBM3 memory less than a month ago now -- and it's as thin as a piece of A4 paper, too.

We don't have the final specification of HBM3 from JEDEC just yet, but SK Hynix has already bumped the initial spec from 5.2Gbps to 6.4Gbps -- and that's a good thing. We should see next-gen accelerators and other HBM3-powered products, with some absolutely brutally-fast memory bandwidth. Hell, the 12-Hi stack on a 1024-bit memory interface can drive 819.2GB/sec per stack... with multiple stacks, we're looking at memory bandwidth numbers never before seen.

SK Hynix teases HBM3 with 12-Hi 24GB stack layout, 6400Mbps speeds 01 | TweakTown.com
SK Hynix teases HBM3 with 12-Hi 24GB stack layout, 6400Mbps speeds 02 | TweakTown.com

The new SK Hynix HBM3 memory could be found on a product with 12 x 12Hi HBM3 stacks, which would unleash 288GB of HBM3 on a single GPU, with a what-in-the-fresh-hell-black-magik-is-this 9.8TB/sec (yes, 9800GB/sec) of memory bandwidth. Insanity, and I want it now. Even if I can't use it, man 9.8TB/sec of memory bandwidth is just so awesome.

Imagine crypto mining on that thing.

SK Hynix teases HBM3 with 12-Hi 24GB stack layout, 6400Mbps speeds 05 | TweakTown.com
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Anthony joined the TweakTown team in 2010 and has since reviewed 100s of graphics cards. 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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