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JEDEC updates HBM2 specifications

Gregster

Gregster

Gregster

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JEDEC is an organization responsible for microelectronics standards. Yesterday JEDEC announced an update to “JESD235 High Bandwidth Memory (HBM) DRAM standard”. It’s basically a cookbook to HBM specifications giving us an insight to what is about to come with HBM2.

According to JEDEC HBM2 will be available in 2, 4 and 8-high stacks. It means that the capacity will vary from 1GB to 8GB per stack. Thus according to those specifications if AMD or NVIDIA decide to use 4 stacks with their future Polaris or Pascal GPUs, we should expect graphics cards with up to 32GB memory capacity. However it is very unlikely we will see gaming cards with such capacities, as 32GB frame buffer should remain exclusive to workstation graphics cards for near future.

The cheapest variant of HBM2 is 1GB per stack in 2-Hi variant, so the lowest capacity per layer is 512 MB (HBM1 has 256MB).
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http://videocardz.com/58127/jedec-updates-hbm2-specifications

Interesting read for those who care what is coming.
 
I suspect we may see APU's with HBM2 this year if just one stack can hold 8GB.
So APU's from 4 to 8GB, they would probably only use 2 stacks which is more bandwidth than current GDDR5 GPU's have.

Gaming GPU's probably from 8 to 16GB @ 4 Stacks.

Happy days. :)
 
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8-16 seems more than sufficient from either vendor. If we're requiring more than 16gb, i don't imagine the GPU will be coping with whatever mad thing you're processing anyway.

Roll on pascal/polaris.
 
FoxEye said:
I got the impression that the vast majority of GPUs in 2016 would be GDDR5 still...

Only the top, top end (Titan /Fury class) would be getting HBM2?
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I think maybe from the high end to enthusiast end yes.

GTX 970/80 and 390/X equivalents @ 8GB HBM2 and 980TI Fury/X @ 16GB.

Nvidia may do a Pascal Titan @ £900 with 32GB.

And don't anyone say there is no need for 8GB+ V-Ram, all developers have to do to fill it is add higher res textures, it will just introduce higher quality IQ in games with the technology being there, its one thing they are waiting for.
 
To me this is just another sign that HBM2 isn't really ready yet. I really do hope that not too many GPU's from both sides are relying on it, else we might not see them for a good long while yet.
 
Bantu said:
so would an APU with HDM not use the system's RAM as shared video memory?
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Zen APU probably, because apu gain way more performance with faster memory, still need to see the impact of it on price, would they add it just to high end APUs or all the line up.
 
Whats holding APU's back right now is having to use System RAM, its just not anything like fast enough and strangles even current APU's.

Zen APU's should have 2 to 3x as much 'umph', imagine the System RAM bottleneck there.

Zen APU's have to have HBM on them.
 
No idea how much HBM costs but surely a 4 core 8 thread Zen with the IPC of Haswell and two of the lowest priced 2 stack HBM's would turn a reasonable profit @ £200.

6 core 12 Thread with two 4 Stack HBM's @ £270.

Currently AMD's rather large 315mm² FX-8### are as low as £120, how much profit is in them?
 
humbug said:
And don't anyone say there is no need for 8GB+ V-Ram, all developers have to do to fill it is add higher res textures, it will just introduce higher quality IQ in games with the technology being there, its one thing they are waiting for.
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At the moment I'd say that 4GB is enough for anything at 1080p (2GB is not), the equivalent for 4K is therefore 16GB. So any "true" 4K card needs 16GB VRAM IMO
 
humbug said:
I think maybe from the high end to enthusiast end yes.

GTX 970/80 and 390/X equivalents @ 8GB HBM2 and 980TI Fury/X @ 16GB.

Nvidia may do a Pascal Titan @ £900 with 32GB.

And don't anyone say there is no need for 8GB+ V-Ram, all developers have to do to fill it is add higher res textures, it will just introduce higher quality IQ in games with the technology being there, its one thing they are waiting for.
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I doubt NVIDIA will put more than 6GB on their 970 replacement, I wouldn't be surprised if it has 4GB, after all that will still be an improvement from the 3.5/0.5GB the 970 currently has.

There's more money to be made by forcing users to upgrade in the future, when cards run out of VRAM, after all.
 
humbug said:
No idea how much HBM costs but surely a 4 core 8 thread Zen with the IPC of Haswell and two of the lowest priced 2 stack HBM's would turn a reasonable profit @ £200.

6 core 12 Thread with two 4 Stack HBM's @ £270.

Currently AMD's rather large 315mm² FX-8### are as low as £120, how much profit is in them?
Click to expand...

Current FX CPU's are 32nm, that technology is ancient, meaning it is fully mature and therefore very cheap. Well cheap compared to 14nm.
 
LambChop said:
is that super dooper gddr5 not gonna be on some cards ? cant remember what its called now.
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Ah you mean GDDR5X

I am guessing that the next generation of cards will be a minimum of 6GB GDRR5X and the top enders will be 16GB HBM2 and the crazy cards will be 32GB HBM2 because you know that Nvidia will do this regardless of cost for their next Titan XXX variant...followed two months later by the 1080Ti at 24GB HBM2 with Titan XXX performance at two thirds the cost.

;)
 
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