AMD: Navi Speculation, Rumours and Discussion [2017-2018]

Discussion in 'Architecture and Products' started by Jawed, Mar 23, 2016.

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  1. 3dilettante

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    Looking at this, I feel this may be an example of how patents can be an imprecise indicator of when work is being done on a technology, when it shows up in a design, or if it will.
    Note in the diagram the existence of a standard API and driver that populates GPU command queues, and then a separate API for coordinating GPUs and controlling a separate mechanism for broadcasting commands and signals, copy commands, and a synchronization queue to manage the the command queues the standard API cannot see.

    One specific item states:
    "However, there is no conventional method for directing by an application which GPU is to render a command, for example, in virtual reality (VR) rendering. It would therefore be beneficial to provide a method and apparatus for directing application requests for rendering."

    Does this sound accurate for the current state of APIs? The prior art is an API with no graphics, compute, or copy queues of any sort and no exposure of the per GPU command queues.
    Is there a need for a mask device to override where commands go in APIs that are designed so that commands only go where the API is instructed to put them?

    This may be a snapshot of work somewhat earlier than the filing date.

    On a side note, the patent on virtual register files is interesting, given some rather old names in the assignee section. Also interesting is the somewhat old verbiage or its divergence from the modern conceptual model of GCN. Whether it's old habits of the designers in question, or a choice that reveals details other designers don't consider relevant isn't clear. AMD often doesn't use the term SIMT as heavily in many of its disclosures, and its description of VALU substructure doesn't go with a SIMD16 description as much as a pixel quad-level organization of a SIMD, and in some ways reminiscent of the original reorientation of GCN's ALUs from Cayman's VLIW-4.
    Whether or not that is a meaningful difference for the claims, the age of the project they came from, or the utilization in a product, I can't say, but I find it interesting.
     
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  2. Nemo

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    So HMC and GDDR6 aren't a JEDEC standard too.
     
  3. Bondrewd

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  4. Nemo

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  5. Bondrewd

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    No one uses HMC.
     
  6. BoMbY

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    That Greg Sadowski guy isn't exactly new, though - seems like he is working for ATI since 2002, or so.

    But yeah, since Raja is mentioned in the Virtual Register patent, and since Navi is supposed to be his baby, ...
     
  7. Nemo

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    Fujitsu.
    And Intel KNL uses MCDRAM, which isn't a JEDEC standard.
     
  8. 3dilettante

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    Most of the assignees are/were longtimers.
    Another assignee, Bajic has been gone from AMD since early 2016, but outside of a stint at Nvidia 2013-2014 had been at AMD and ATI.

    I just found it interesting that there may be an influence on the language based on the individuals' history.
     
  9. el etro

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    I am thinking at 300% of GTX1080ti DX10/11 performance, for the biggest Navi.
     
  10. Geeforcer

    Geeforcer Harmlessly Evil
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    Arriving when, Q3 2019?
     
  11. Grall

    Grall Invisible Member
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    If you're gonna dream, dream big!
     
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  12. no-X

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    Triple performance in ~18 months? Still too optimistic.
     
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  13. el etro

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    With triple the transistor density and double the power efficiency, real challenge will be to keep power consumption on the line. Don't expect Nvidia don't haves a proper answer to this.
     
  14. el etro

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    2019 but what quarter is a mystery.
     
  15. Nemo

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    Vega20 (gfx906/7) and Navi10 (gfx1000/1001) spotted in the Radeon Software Adrenalin Edition 18.1.1 Alpha Driver
    [​IMG]
     
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  16. Bondrewd

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    Well, both should be past the tapeout assuming TSMC is the foundry of choice.
     
  17. BoMbY

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    It's not likely they are using TSMC, and I'm pretty sure they have taped out their first 7nm chips at GloFo.

    If you see a device anywhere with the PCI Device-ID 0x7310, or higher, that's very likely Navi.
     
  18. Bondrewd

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    Very likely, it's the only chance for 7nm GPUs to be fabbed in any reasonable quantities.
     
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  19. Kaotik

    Kaotik Drunk Member
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    You got some first hand data on TSMC and GloFo 7nm capacities and how much every other company is reserving from TSMC's capacity?
     
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  20. Nemo

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    Navi10 = GFX10 is also marked as NV10

    [​IMG]
     
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