AMD: R8xx Speculation

Discussion in 'Architecture and Products' started by Shtal, Jul 19, 2008.

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How soon will Nvidia respond with GT300 to upcoming ATI-RV870 lineup GPUs

Poll closed Oct 14, 2009.
  1. Within 1 or 2 weeks

    1 vote(s)
    0.6%
  2. Within a month

    5 vote(s)
    3.2%
  3. Within couple months

    28 vote(s)
    18.1%
  4. Very late this year

    52 vote(s)
    33.5%
  5. Not until next year

    69 vote(s)
    44.5%
  1. Shtal

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    Thanks!
     
  2. Shtal

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  3. Arnold Beckenbauer

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    DAAMIT did a good work, if their R600's tessellation can be used with D3D11.
     
    #83 Arnold Beckenbauer, Jul 31, 2008
    Last edited by a moderator: Jul 31, 2008
  4. fellix

    fellix Hey, You!
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    I really hope the game dev's would put the HW tessellation at good use some time around DX11 establishment. Global LOD systems in numerous game engines would benefit greatly from that, I think.
     
  5. liolio

    liolio Aquoiboniste
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    Maybe Ms has good reason to make this units supported ;)

    I think about benefit from these development efforts on the 360 which include one tessellation unit.
     
  6. Jawed

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    Somehow I suspect that RV770 and earlier tessellation, at best, will only be a subset of D3D11 tessellation. If there are control shaders and a different ordering for pipeline operations involved in tessellation in D3D11 then all we might be seeing in D3D10/10.1/ATI tessellation is some kind of "basic" functionality.

    Perhaps similar to the way that render to vertex buffer (using pixel shaders) is a partial capability for certain kinds of vertex-texturing type operations under D3D9/10.

    Jawed
     
  7. chavvdarrr

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    any idea if tesselation units in R6xx are/will be used anywhere?!
    The whole idea with puting dedicated hardware for something that noone uses puzzles me
     
  8. pjbliverpool

    pjbliverpool B3D Scallywag
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    I think Viva Pinata used it on the PC.
     
  9. ShaidarHaran

    ShaidarHaran hardware monkey
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    Well it certainly used it on the 360, I didn't even know there was a PC version of Viva Pinata :p
     
  10. pjbliverpool

    pjbliverpool B3D Scallywag
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    Lol, I knew someone would say that :wink: Its amazing how many console games (fairly big ones at that) make it to the PC completely unnoticed, and yet we are bomabarded with the complaint that there are no good games on the PC. :sad:
     
  11. CJ

    CJ
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  12. MfA

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    Nao, what specifically couldn't they do in your opinion? They have scatter and gather, at that point they are pretty much general ... there's a lot of things they can't do efficiently, but not a lot they can't do at all. One of the RV670 diagrams also shows a feedback path from the shader export to the setup engine ... their tesselator might not be able to handle the tesselation, but that doesn't really exhaust their options in and of itself.
     
  13. whocares

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  14. Shtal

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    http://www.nordichardware.com/news,7999.html
    I though Pete said it will stay at 16, it has to be a mistake for 40 ROP's.
     
  15. Shtal

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    RV870 at 40nm is 140m㎡ - is it possible? - I calculated RV770 at 40nm will be @118m㎡

    EDIT: Extra 32 ALU's, 8TMU's, 8ROP's, ATI wil try to fit into ~22m㎡ to make up total 140m㎡ - how??
     
    #95 Shtal, Aug 2, 2008
    Last edited by a moderator: Aug 2, 2008
  16. Lukfi

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    I pretty much think they'll stick to 256bit bus and 16 RBEs. If needed, the RBEs can be beefed up somehow, or cut down and doubled. Depends on the way you count it, because to be exact there are four "units" in RV770 each handling one 64bit mem. channel and capable of a certain number of raster operations. The same should be true for RV870 as well, since I don't expect GDDR5 to be a bottleneck with a 256b interface.

    But I find it weird for a 40nm chip to have only 192 ALUs if ATI can put 160 on a not-that-big chip at 55nm.
     
  17. Shtal

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  18. Arun

    Arun Unknown.
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    20% better? Oh yay, yet some more ATI FUD to try to make NVIDIA underestimate them. As if we hadn't seen that one before! :D
     
  19. Kaotik

    Kaotik Drunk Member
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    Or then the chips will actually appear much sooner than thought (how soon TSMC is ready for fullscale 45 or 40nm production?), possibly even named RV790 or something instead of RV870, basic shrink with a bit added on top?
     
  20. Shtal

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    You mean Nvidia believed RV770 will be slightly better then RV670 with only 480SP's (96 *5D) for RV770.

    EDIT: Or 20% better for RV770b @ 40nm clocked 900MHz for the GPU.
     
    #100 Shtal, Aug 2, 2008
    Last edited by a moderator: Aug 2, 2008
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