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AMD's High Bandwidth Memory official slides.

post #1 of 13
Thread Starter 
Hey everyone, I'm extremely excited to finally be able to share some Official news about High Bandwidth Memory. Hopefully this will get you guys a bit excited for things to come biggrin.gif

I'll shut up now and share all the slides, I recorded a video of discussing the slides in detail I'll link it at the bottom if you're interested

1

http://www.overclock.net/content/type/61/id/2458494/


2

http://www.overclock.net/content/type/61/id/2458495/


3

http://www.overclock.net/content/type/61/id/2458496/


4

http://www.overclock.net/content/type/61/id/2458497/


5

http://www.overclock.net/content/type/61/id/2458498/


6

http://www.overclock.net/content/type/61/id/2458499/


7

http://www.overclock.net/content/type/61/id/2458500/


8

http://www.overclock.net/content/type/61/id/2458501/


9

http://www.overclock.net/content/type/61/id/2458502/


10

http://www.overclock.net/content/type/61/id/2458503/


11

http://www.overclock.net/content/type/61/id/2458504/


12

http://www.overclock.net/content/type/61/id/2458505/


13

http://www.overclock.net/content/type/61/id/2458506/


And a the link to the video I promised smile.gif

https://www.youtube.com/watch?v=NbZzrb50S-A
post #2 of 13
Nice..... drool.gif
 
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post #3 of 13
Thank you for the information! Really looking forward to the new cards.
post #4 of 13
This is going to be great!
post #5 of 13
GIEF NOW.
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post #6 of 13
@jackalopeaterh, I have a question. There was a lot of emphasis on form factor. That sounds great that we can get the same or better performance than we have now on a card 1/3 the size, but when will we see a full 10 inch pcb stacked with HBM? If you can do more with less space, how much can be done with the same space, I guess is my question.
post #7 of 13
Thread Starter 
Quote:
Originally Posted by denman View Post

@jackalopeaterh, I have a question. There was a lot of emphasis on form factor. That sounds great that we can get the same or better performance than we have now on a card 1/3 the size, but when will we see a full 10 inch pcb stacked with HBM? If you can do more with less space, how much can be done with the same space, I guess is my question.

That'll be very interesting to see what comes of it smile.gif
post #8 of 13
I wonder how the varying heights of the stacks on the interposer (assuming they are different - obviously that last slide isn't to scale) is going to complicate cooler design, seems like it would reduce tolerances significantly.
post #9 of 13
How will HBM affect overclocking is the real question. Will the extra heat of the memory and GPU being so close to each other make maximum overclocks lower than if the card was using traditional non-stacked DRAM.
 
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post #10 of 13
Yup, 4GB for GEN1 ... unless you dual stack it, which is what AMD is using, but it is unknown if AMD will use a single stack and be limited to 4GB or go with a dual stack and increase the possibility to 8GB. nVidia is skipping GEN1 and going with GEN2 for Pascal, which has a LOT more capacity (upwards of 64GB down the road, but 16GB initially) and double the speed.

Video Cardz
Quote:
1st Gen HBM

Hynix plans to put four DRAM slices over a single base layer. DRAM dies will be connected to each other with vertical channels called through-silicon vias (TSV). Each of those is capable of transmitting 1Gbps, which theoretically should give us 128GB/s of bandwidth. First generation of HBM would offer up to 4 dies per stack.

2nd Gen HBM

Hynix is still developing this technology. The company is currently testing 256 MB slices forming 1GB stacks. Soon, Hynix will start stacking 1GB dies to form 4GB modules. And we are just talking about 4-layer stacks. Nothing, except further research and development, is keeping us away from stacking 8 layers, only this option will only increase the capacity, as bandwidth will be limited to what 4-layers can offer (at least that’s what I’m getting from these slides). Second generation HBM will be available either 4 or 8 layers (forming 4GB or 8GB stacks). The speed per stack will double (256 GB/s).

WCCF
Quote:
4xHBM Gen 1 = 4 GB
3xHBM Gen 1 = 3 GB
2xHBM Gen 1 = 2 GB
1xHBM Gen 1 = 1 GB

4xHBM Gen 2 = 16 GB/32 GB/64 GB
3xHBM Gen 2 = 12 GB/24 GB/48 GB
2xHBM Gen 2 = 8 GB/16 GB/32 GB
1xHBM Gen 2 = 4 GB/8 GB/16 GB
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