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SK Hynix Details its Upcoming HBM3 Memory: 665 GB/s per Stack


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SK Hynix is at the forefront of developing the next generation of stacked high-bandwidth memory, the HBM3 standard. Succeeding the current HBM2e standard, HBM3 will power next-generation HPC and AI processors in high-density multi-chip modules. A Tom's Hardware report citing information from SK Hynix reveals two key details about the new standard. For starters, it could offer per-pin data-rates of 5.2 Gbps, a 44% increase over the 3.6 Gbps that HBM2e caps out at. This results in a per-stack bandwidth of 665 GB/s, compared to 480 GB/s for the HBM2e. A processor with four such stacks (over a 4096-bit wide bus), would hence enjoy 2.66 TB/s of memory bandwidth. It's likely that HBM3 stacks from SK Hynix could implement the DBI Ultra 2.5D/3D hybrid bonding interconnect technology licensed from Xperi Corp.

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Apr 12, 2013
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Great, now just use a single stack for zen4/5 based APU or even CPU's after which Intel will probably through in the towel :nutkick:
May 12, 2017
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This is what I would love in a Nano GFX card. ...Lets see if GDDR6x can responded to those speed.
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Great, now just use a single stack for zen4/5 based APU or even CPU's after which Intel will probably through in the towel :nutkick:
You know, I've ALWAYS wanted a powerhouse APU, something akin to the amount of CUs in the Xbox Series X Soc, but with 8GB of HBM2e integrated into the Soc. I think these will eventually come, but I think the major hurdle is a consumer one. What I mean by that, is that the vast majority of buyers want to be able to independently upgrade their CPU, GPU and system memory, so an Soc that ties you to a locked combo probably wouldn't be that widely popular on the DIY market. They would make epic SFF builds though.

Personaly, I wouldn't care if such APUs required a package the size of threadripper, but I realize I don't represent the majority.
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Those 240,000 wafers weren't defective after all, they were radioactivated and destined to become HBM3, but were then sent out to customers in confusion due to shortages and Covid.
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pointless, until radeon/geforce build cards with this many speed it's only will be for computational cards 5000$ and higher, it sad becuase this speed is need for ray trace performance :x