AMD: Navi Speculation, Rumours and Discussion [2019]

Discussion in 'Architecture and Products' started by Kaotik, Jan 2, 2019.

  1. kalelovil

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    By refresh they presumably just mean higher clocks from the same chips with a new product name.
    Because taping out a new die is expensive, and supply on 7nm+ might be quite restrictive.
    It is what AMD have done most generations since GCN1. 7800->R9 270->R7 370, RX 480->RX 580->RX 590, etc.
     
  2. Bondrewd

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    Yeah, Lisa had to seed Zen people there and clean the house.
    Now they have a real damn problem, software.
    And tight deadlines for it to boot.
    They'd even talk more of it at Analyst Day.
    Lovely.
    They can tape out only so many expensive bleeding edge foundry GPU dies per year.
    So it's like 3/4 dGPU dies yearly, so bi-yearly full lineup die replacement cadence.
     
    #1742 Bondrewd, Jan 29, 2020
    Last edited: Jan 29, 2020
  3. Kaotik

    Kaotik Drunk Member
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    The question is, is AnandTech quote right?
    Seeking Alpha, which provides transcripts of these calls, has small but significant differences:
    https://seekingalpha.com/article/43...-results-earnings-call-transcript?part=single

    The way it's worded at AnandTech suggests one would be RDNA2 and rest refreshes of RDNA, even if it could be read also as refreshes will be RDNA2.
    Seeking Alphas quote leaves little room for anything but refreshes being RDNA2 too.
     
  4. Nebuchadnezzar

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    The SA quote is wrong, there's a comma/pause between the two statements, it's also "we'll have" not "will have".
     
    #1744 Nebuchadnezzar, Jan 29, 2020
    Last edited: Jan 29, 2020
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  5. Kaotik

    Kaotik Drunk Member
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  6. Malo

    Malo Yak Mechanicum
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    Also "next generation" to AMD almost meant Zen to Zen+ ;)
     
  7. Kaotik

    Kaotik Drunk Member
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    Yeah, but they've separately confirmed that RDNA2 has hardware acceleration for RT so it's more than Zen to Zen+
     
  8. Ryan Smith

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    I fully expect that RDNA2 will have a new graphics architecture, which is something AMD couldn't do for RDNA(1). Navi's graphics core is essentially unchanged from Vega, which was a bit behind the curve even when it launched. So RDNA2 chips are going to be quite a big change from RDNA(1), even if the compute architecture itself isn't changing.
     
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  9. Kaotik

    Kaotik Drunk Member
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    Tom's Hardware has some clarification from AMD: https://www.tomshardware.com/news/amds-navi-to-be-refreshed-with-next-gen-rdna-architecture-in-2020
     
  10. ethernity

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    Couldn't do because of lack of technical ability or because of the need to allow flexibility to behave like GCN as needed for Console backwards compatibility?
     
  11. Bondrewd

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    Series X is RDNA2, and it works just fine in BC.
     
  12. iroboto

    iroboto Daft Funk
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    Does this mean Series X is RDNA 2? Is there a way we can rule out that it isn't RDNA 1 with some features of RDNA 2 back ported?
     
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  13. entity279

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    AMD phrased it rather Series X is RDNA 1.5ish, iirc
     
  14. Kaotik

    Kaotik Drunk Member
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    I'm pretty sure AMD has said nothing of the sorts, they've been really careful not to say anything their semi-custom customers haven't said themselves before.
    Currently the assumption is that both PS5 and XSX are RDNA2 simply because they have RT-acceleration and it would be odd if they came over a year after RDNA using RDNA with things bolted on rather than already also out (by the time consoles launch) RDNA2
     
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  15. trinibwoy

    trinibwoy Meh
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    The consoles aren’t coming over a year after RDNA. I imagine features and apis were locked down a long time ago to give developers sufficient time with the new hardware.
     
  16. Kaotik

    Kaotik Drunk Member
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    The console are coming to market for holiday 2020, that's over a year after RDNA. Yes, features etc get locked down long before launch, but that's just as much true for PC GPUs (clocks etc, no matter if it's PC GPU or console, can be adjusted late)
     
  17. Globalisateur

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    You are all setting yourself up for disappointment. No one ever said this officially in any way. Almost all evidence (except the dubious "hardware accelerated" definition historically used by Microsoft for any rendering being DirectX accelerated) point to XSX being regular RDNA1.
     
  18. JoeJ

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    So you seriously consider RT and VRS could be GPU software solutions?
    Doubt it. "Hardware accelerated raytracing" was pretty much the first sentence in Scarlet reveal trailer. Why would they put such a misleading statement in front?
    And second: MS has discontinued development of DXR software fallback layer, indicating they have no current interest in compute RT.

    Edit: What would be an example of a feature that DX enabled without underlying HW support?
     
    #1758 JoeJ, Jan 30, 2020
    Last edited: Jan 30, 2020
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  19. trinibwoy

    trinibwoy Meh
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    I doubt the lead times for pc AIB cards are anywhere close to the lead times for custom console hardware. Especially when those cards aren’t bringing any new features to the table. Point is that next gen console hardware could have been finalized before rdna 2 was ready given the long lead times.
     
  20. trinibwoy

    trinibwoy Meh
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    Were they ever interested in compute RT beyond a proof of concept? DirectX primarily provides apis not implementations.
     
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