New Upcoming ATI/AMD GPU's Thread: Leaks, Hopes & Aftermarket GPU's

Discussion in 'Videocards - AMD Radeon' started by OnnA, Jul 9, 2016.

  1. Fox2232

    Fox2232 Ancient Guru

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    Clock 2 Clock, Vega currently performs 5~9% worse than Fiji. So, I guess getting 5% in this type of comparison above Fiji is far from impossible.
    Especially since Fiji has 8.9B transistors, while Vega should be close to 11~12B. That would be pretty bad transistor investment if it did not count for anything.
     
  2. haste

    haste Ancient Guru

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    IMO most of those transistors are buried in more complex ALUs. Fiji had 1:16 scaling in double vs single precision. VEGA should have full 1:2:4 (double:single:half precision). NVIDIA has the same scaling in P100, while gaming chips (starting with P102) are different. For games you don't really need double precision and most shaders are not optimized for half precision either.

    I still hope that RX VEGA will be different silicon. With simpler single-precision ALUs, they could save a lot of die space.
     
  3. Fox2232

    Fox2232 Ancient Guru

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    That would be optimal, as 500 mm^2 could fit 6144SP if it was just Fiji on 14nm.
    That would mean 50% performance from robustness and then 40% from clock... 1.5 * 1.4 = 2.1 x theoretical Fiji performance.
    But I think that is unlikely. It would be surprising.
     
  4. PrMinisterGR

    PrMinisterGR Ancient Guru

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    And possibly a better gaming chip.
     

  5. Loophole35

    Loophole35 Ancient Guru

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    Or they could have already made a big Polaris.

    Yes I'm beating that dead horse again.
     
  6. Maddness

    Maddness Ancient Guru

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    Well if RX performs like the FE, them just maybe they should have.
     
  7. Noisiv

    Noisiv Ancient Guru

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    nothing wrong with 1080 FE performance.
    pretty much perfect at 2560x1440.
    its just that i dont want it at 500 moneys and 250W
     
  8. Illnino

    Illnino Master Guru

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    That still the FE edition and overclocked.

    Gamers Nexus tested both "Pro mode" and "Gaming mode" with little to no difference which what brings me to believe is AMD is either deliberately holding back the gaming performance until the release on the 29th OR the driver just isn't ready yet.
     
  9. Denial

    Denial Ancient Guru

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    Or there is no performance difference between Pro and Gaming? AMD itself said the only difference is in the software features enabled like Wattman. It's also the same on the Pro Duo which was released a while ago. So I'm not sure why people are expecting it.
     
  10. Illnino

    Illnino Master Guru

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    Well if that turns out to be the case then someone call the fire brigade!
     

  11. OnnA

    OnnA Ancient Guru

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    When they do Gaming Drivers, Log-Off will be required :)
    .dll's will be different then.
     
  12. PrMinisterGR

    PrMinisterGR Ancient Guru

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    Actually it won't be required, the way Windows loads drivers at least.
     
  13. OnnA

    OnnA Ancient Guru

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    Direct3D 12 feature checker (July 2017) by DmitryKo
    -> https://forum.beyond3d.com/threads/direct3d-feature-levels-discussion.56575/page-9#post-1840641

    -> Download:
    https://mega.nz/#!AE1TXKQR!FTm02oRKAeFu23qin1HZs8sLTblieEXNaX54s-ParKM


    Kingdom Come: Deliverance SVOTI (SVOGI, Voxel GI, CryEngine) on/off comparison (with FPS)



    # UE4 by default only handles static global illumination (static geometry + static lights). It does also include a fully dynamic technique called LPV, but it's been marked as experimental forever and kind of sucks in practice (tons of light leaking through objects).

    # Unity and Cryengine have semi-dynamic GI, where lights can be moved dynamically and dynamic objects receive indirect light, but only static geometry actually contributes to indirect lighting. Cryengine also has an experimental fully-dynamic GI solution called SVOGI, but it performs voxelization asynchronously on the CPU so lighting updates often lag behind the scene changes that caused them.

    -> VXGI is fully dynamic and by far the most accurate dynamic solution, but intensive on the GPU even with conservative rasterization support.

     
    Last edited: Jul 8, 2017
  14. haste

    haste Ancient Guru

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    ^ OnnA, could you explain to me what has DX12FeatureChecker to do with an old voxel-based GI used in CryEngine since 3.8.3 or Enlighten, which is here for many years? Coz I don't get it.
     
  15. Dekaohtoura

    Dekaohtoura Master Guru

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    TY!

    Didn't know that stacking played such a crucial role.
     

  16. pharma

    pharma Ancient Guru

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    GPU Base, Boost, Typical and Peak clocks, what’s the difference?
    https://video cardz.com/70838/gpu-base-boost-typical-and-peak-clocks-whats-the-difference
     
  17. OnnA

    OnnA Ancient Guru

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    Separate interesting knowledge topics :)
     
  18. haste

    haste Ancient Guru

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    OK. In that case I could build on that and correct/add some facts:

    NVIDIA's VXGI (which is part of GameWorks) is probably the best fully dynamic GI solution. It can be added as a plugin to any engine. There is plugin for UE4, so even UE4 has the best dynamic GI solution available:
    But (IMHO) the best visual quality overall delivers semi-dynamic GI Enlighten. Which is a standalone plugin and is also available for UE3-4. It has been integrated into Unity since version 5 and now it has become its de facto lighting system.
     
    Last edited: Jul 9, 2017
  19. Fox2232

    Fox2232 Ancient Guru

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    There is rumor going around internet. It says that AMD did not hand over final RX Vega vBIOSes to manufacturers. Just in form required to actually do quality checks.

    If that's true then we can throw all 'leaked' benchmarks out of window. Final vBIOSes should be handed over around time of launch.

    I, personally, am not concerned about Vega much. But I really wonder about silence surrounding Raven Ridge.
     
  20. Maddness

    Maddness Ancient Guru

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    I think that's clutching at straws considering they are already in retail.
     

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