AMD Radeon RDNA2 Navi (RX 6500, 6600, 6700, 6800, 6900 XT)

Discussion in 'Architecture and Products' started by BRiT, Oct 28, 2020.

  1. Voxilla

    Voxilla Regular

    Pretty cool, by the looks of the memory bandwidth slide, they are using 14 Gb/s and not 16 Gb/s GDDR6.
    Edit: could be both, but seems to be 16 Gb/s based footnotes
     
    Last edited: Oct 28, 2020
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  2. AlphaWolf

    AlphaWolf Specious Misanthrope Legend

    So what are the odds of 'unlocking' 8 CUs on a 6800xt?
     
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  3. yuri

    yuri Regular

    Some points:
    * most of the graphs showing AMD results were achieved using the OC (Rage Mode) and some even the "Ryzen 5k + chipset" magic - this is not good
    * not a single slide showing Ray Tracing - this telling
    * the cut down version got still whole 128MB cache
     
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  4. BRiT

    BRiT (>• •)>⌐■-■ (⌐■-■) Moderator Legend Alpha

    Updated first post with models, prices, dates, and the great pics from the presentation that @Man from Atlantis posted throughout the thread.
     
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  5. Leoneazzurro5

    Leoneazzurro5 Regular

    6900XT used both rage mode and direct access
    6800XT graphs used none of those
    6800 graph used only direct access

    About ray tracing we already knew, and it would have not been anyway a fair comparison because no game out there has optimizations for RDNA2 and they are all RTX sauce
     
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  6. eastmen

    eastmen Legend Subscriber

    1) I believe they clearly marked the benchmarks using the OC and other features and then clearly show how much the other featuers are adding to it

    2) one of the youtubers who got the majority of this right said its faster than the 2xx0 series but not as fast as the 30x0 series. Whatever it is it will run much faster than the consoles which is what the majority of devs will target

    3) Adjusting the ram speed is most likely enough to change the performance , the cache speed also changes with clocks of the chip i'd wager
     
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  7. Rootax

    Rootax Veteran

    So yeah not showing RT is not good for me, even if the rumors are true... How can you not show the big progress in graphics...
     
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  8. eastmen

    eastmen Legend Subscriber



    gamer nexus talks about the new cards.
     
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  9. Cyan

    Cyan orange Legend

    I've fallen in love with the 6800. Btw.....

     
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  10. LordEC911

    LordEC911 Regular

    Possibly an endless loop of NDAs.
    AMD being the chip design, Sony/MS being the console/dev, then the actual games themselves.
     
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  11. [​IMG]

    RX 6000 Reference PCB

    [​IMG]

    [​IMG]
     
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  12. Cyan

    Cyan orange Legend

    they have RT, they mentioned it in the presentation several times, as part of Fidelity FX features
     
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  13. LordEC911

    LordEC911 Regular

    I thought I remembered reading about one of the consoles having a fixed function unit to handle something similar.
    I may have got it mixed up with something else since there was a lot of talk about fixed function units increasing performance for small increases of die space.
     
  14. manux

    manux Veteran

    The open question is in rt performance. It's heavy and dips framerate on nvidia cards. If it was faster on amd that would be great, if it's much slower it might not be at all usable. Many gamers in rt titles prefer using dlss to get the performance back to excellent levels.
     
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  15. Strange

    Strange Veteran

    So here's the comparison of all known RDNA 2 products from a relative performance perspective

    upload_2020-10-29_0-54-4.png
     
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  16. BRiT

    BRiT (>• •)>⌐■-■ (⌐■-■) Moderator Legend Alpha

    But we don't entirely know that on PS5 since it's clocking scheme is different. Nor do we know the amount of time the RX GPUs spend at the various clocks. Both offer more dynamic clocking than what we're used to.
     
  17. eastmen

    eastmen Legend Subscriber

    Looks like they made marketing deals so we might find out more on the days of the videos

    Dirt 5 feature video oct 29th
    Godfall - Nov 2
    WOW - nov 10th
    Rift breaker - nov 12th
    Farcry 6 - nov 17

    so perhaps performance will be shared then.
     
  18. ShaidarHaran

    ShaidarHaran hardware monkey Veteran

    Precisely. I don't mind using DLSS to achieve "playable" performance at high resolution + high quality settings + RT. If AMD's RT performance isn't up to par then that makes this a less compelling offering.
     
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  19. LordEC911

    LordEC911 Regular

    So we expect consoles at about half the performance to run 4k RT at 30-60fps but these new cards are unable to?
     
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  20. Jawed

    Jawed Legend

    [​IMG]

    So the binning on 6900XT must be pretty keen, to get 65% performance per watt improvement over Navi 10 and be the same power consumption as 6800XT.
     
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