A 460mm2 chip would be almost twice the size of Polaris 10. Given HBM memory interfaces are meant to use less silicon than GDDR5, that would imply more than twice the shaders of Polaris 10?
I'm concerned what that actually means for Vega - all the previous rumours were stacking up so nicely with the limited information we've been fed so far, in particular the 4096 shaders @ ~ 1500MHz giving 12.5TFlops compute. But that's a lot less than twice as many shaders as Polaris 10, so if the rumours and die size hold it's really burning silicon area for something other than shader count (maybe to enable the higher clock speeds?). But perhaps more worryingly, the implied performance was just behind GTX 1080. If they've had to go to a 460mm2 die just to at best equal GTX 1080, they don't have much room to go after any derivatives of GP102.
My expectation would've been a ~ 400mm2 Vega 10 with Vega 11 pushing up to a Fiji-esque ~ 600mm2. I know it's a wait and see game, but my expectations of Vega have just taken a bit of a nose-dive...
Vega 10 and Vega 20 slides are leaked:
It looks like the GPU demoed is the smaller Vega 10,so hopefully it means it will be the gaming orientated GPU of the lineup.
That should mean it is more a Titan X competitor IMHO OFC.
Read it wrong - it looks like Vega 10 is the bigger chip.
This means Vega 10 needs decent FP64 performance,which means additional space taken up for such functionality.
Remember,Fiji did not replace Hawaii in certain markets as it has a worse FP64 performance rate IIRC.
Unless the uarch changes have massively improved core utilisation,clockspeeds,etc the gaming orientated GP102 is not only slightly bigger,but should beat Vega10 IMHO OFC.
Or on http://www.amd.com/en-us/products/graphics/desktop/r9, either.
You really need to stop comparing CUDA to Stream. They're not equivalent. The nearest equivalent AMD has to CUDA is OpenCL, but of course that's an open standard they support, rather than a closed ecosystem they control. Stream is simply a set of technologies that enhance the running of OpenCL on certain graphics cards. I've already given you the comparable AMD link to nvidia's cuda zone - it's their OpenCL zone at
Note that the url is almost identical to nvidia's?
Seriously, I know I work in the industry somewhat, but I don't think the difference is that hard to understand, is it? Certainly I'd hope anyone who worked in a field where they needed to know about parallel compute would be able to understand the difference between OpenCLK, the platform and API they'd use to write compute tasks for AMD GPUs, and Stream, a set of optmising technologies that AMD provides for certain GPU classes? *shrug* Maybe I'm just crediting people with too much intelligence...
stream processors not being used in standard desktop programs is'nt really a good sign to hold up
Actually looking at that chart it seems Vega20 is replacing Hawaii,not Vega10. Hence,it does imply it is more a SP part,and makes the performance figures we seen so far more confusing.
The latest TPU reviews put the GTX1080 as being 71% faster at 1080P.
Something seems off,unless the performance figures we have seen are for parts which are not fully enabled,not hitting expected clockspeeds or the drivers are not fully functional.
Another consideration is whether Vega10 is hitting a TDP limit too. Its only 50% more than Polaris10,so it means it needs to be more efficient than Polaris 10 by a decent amount to even hit GP104 level performance.
*shrug* yeah, really don't know what AMD are doing in the GPU arena now. If that's all true then they barely have an answer to GP104, let alone GP102. Very disappointed...
As a little aside, Intel's Knights <X> platform is actually making huge strides in research HPC thanks to a decent investment in developer tools and relations. It's another area that I'm sure AMD would be investing more in if they weren't quite so financially restricted...
The Vega competition on ve.ga painted the worst case scenario: the T&Cs said winners would be selected on 5th February 2017 and they would receive their Vega graphics card prize "within 28 weeks" so... 20th August 2017.
AMD have a tool to convert cuda code to "stream" code https://developer.amd.com/wordpress/...-US-Letter.pdf
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