AMD Vega 10, Vega 11, Vega 12 and Vega 20 Rumors and Discussion

Discussion in 'Architecture and Products' started by ToTTenTranz, Sep 20, 2016.

  1. sebbbi

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    Is it reasonable to assume that 8 GB of HBM2 could run at slightly higher clocks than 16 GB? Aren't those 16 GB stacks pretty high? What about HBM2 power consumption?
     
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  2. AlBran

    AlBran Ferro-Fibrous
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    ¯\_(ツ)_/¯ I didn't get much of an answer before.
     
  3. 3dilettante

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    There may be fewer thermal concerns for the bottom die if there are four fewer powered dies in the stack above. That might help somewhat with avoiding throttling. I wouldn't know if the extra client on the channel could influence signal integrity.

    I have not seen a cross section of an 8-hi HBM2 stack, but the lower elements of the stack are all die-thinned. For 4-hi HBM stacks, the topmost DRAM die is the one they don't bother to thin, and it's about as thick as the rest of the DRAM layers combined.

    An 8-hi would be taller, which could pose a mechanical concern if it cannot match the GPU's height even if the difference amounts to one or two non-thinned DRAM dies.

    HBM2's signalling power relative to HBM would most likely track with difference in their bit rates. HBM2's arrays would be the major DRAM-side consumers, and that may scale with their activity (scales with bandwidth and cost of array access) although pseudo-channel mode may make HBM2 more efficient with sub-page granularity accesses.
    The voltages some think HBM2 is running at may be high, and the power cost of array accesses and refresh can be modified by what generation of DRAM arrays is being used and what process is being used.
    I have not seen what node HBM2 is currently on.
     
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  4. Anarchist4000

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    Raja did say the RX would be faster, but that's generally assumed to be higher clocks from better cooling and not a huge delta. Driver performance should affect both equally. Memory pool likely not playing much of a part save for some extreme cases.

    Sure would make regression testing a lot easier if there was a dropdown for a year's worth of driver versions.

    Probably reasonable and the 8-Hi's were hitting 1100MHz fairly consistently, but as mentioned above, they may perform better even at identical clocks due to less thermal issues. As for power, obviously less static energy costs refreshing the DRAM, but likely the same energy during transmission. I'd ballpark a third less power by cutting the memory in half from what's probably in the 40-50W range at 16GB.
     
  5. Geeforcer

    Geeforcer Harmlessly Evil
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    I think most of that discussion centered on the software side of things ala "illegitimate results; Fury drivers!; wait for the real drivers, you can't judge Vega by Vega FE, etc etc"
     
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  6. Megadrive1988

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  7. Malo

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    So nothing will be livestreamed from the SIGGRAPH event, only some tweets apparently o_O

     
  8. CarstenS

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    Wow.
     
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  9. Anarchist4000

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    Starting a livestream in the middle of Game of Thrones was probably a bad idea if the goal was a bunch of gamers tuning in.
     
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  10. Malo

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    Well hopefully they'll put up a video a day or two afterwards, like they have with recent events.
     
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  11. ToTTenTranz

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    Lol these guys have gone nuts.
     
  12. DavidGraham

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  13. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    So y'all want me to take some videos for you, eh?
     
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  14. ShaidarHaran

    ShaidarHaran hardware monkey
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    Live blog would be best.
     
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  15. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    Lemme see how drunk i can get 'em and maybe they let me post some teases. :)
     
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  16. Genotypical

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    Bound to be a weird launch with the GPU already in the wild. And whatever (driver) improvements come with rx vega will likely come to vega fe. So "faster than vega fe" is bound to be down to clocks.
     
  17. ToTTenTranz

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  18. ToTTenTranz

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    So Vega FX won't actually be launched at Siggraph because it was launched to the press at this Linus Tech show..?



     
  19. CarstenS

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    Interesting. Was. Yesterday. Feeling kind of oversaturated by constant trickling of µ-info. Maybe, for good measure, AMD could announce price digit-wise? My money is on a 9 as the last digit. Maybe even for second-to-last, although that might be as well a 7. And next week, we'll get to know the 3rd-to-last digit. Whether or not that's the final one will be revealed later in an upcoming exklusive LTT-show.
     
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  20. Rootax

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    Why does hardware canuck said competition is back ? And the Linus video was embarassing. If you have nothing to show, stay quiet ffs...
    Some PR ppl at AMD need to find a new job.
     
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