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Thread: Open-Source ATI R600/700 Mesa 3D Performance

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  1. #1
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    Default Open-Source ATI R600/700 Mesa 3D Performance

    Phoronix: Open-Source ATI R600/700 Mesa 3D Performance

    As we alluded to last week, we have been in the process of benchmarking many Radeon HD 2000/3000/4000 series graphics cards using the open-source ATI Linux graphics stack with the Mesa R600/700 DRI driver. We have now carried out our first batch of R600/700 3D tests using this constantly evolving open-source driver to provide OpenGL acceleration and here are the results.

    http://www.phoronix.com/vr.php?view=14575

  2. #2
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    That's interesting - I would have expected the HD3650 and HD2600 to be relatively close in performance, but the 3650 seemed to be quite a bit faster across the board. Was there anything "special" about the 2600 - I'm sure you would have mentioned if it was AGP

  3. #3

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    Quote Originally Posted by bridgman View Post
    That's interesting - I would have expected the HD3650 and HD2600 to be relatively close in performance, but the 3650 seemed to be quite a bit faster across the board. Was there anything "special" about the 2600 - I'm sure you would have mentioned if it was AGP
    Of course not, I haven't touched AGP in years. It's just a standard HD 2600PRO.

  4. #4
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    Video decoding: GL2
    Video decoding: X-Video
    Neither of them does decode the video, they just do colorspace conversation and scaling.

  5. #5
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    You can obviously see that tremoulus is bottlenecked somewhere else than the graphics performance. The framerates stay the same on most resolutions for most of the cards.
    The results arent much dependent on the performance of the graphics card alone (all 48xx lines are virtually identical).
    This is so obvious, Mike should have commented on this, instead of just saying "Tremoulus is more demanding". Something else is afoot there.

  6. #6
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    Something is definitely fishy with the HD2600 results. The Xv and mesa code is more or less identical for all the r6xx chips and there are no aspects of that code that require more CPU on one asic compared to another. I can see the gpu performance being somewhat variable, but the cpu usage shouldn't vary much.

  7. #7
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    Default Bad and good surprises

    I thought that my HD3650 would have been nearer to the HD3850... it's almost half the performance!
    It's quite a low level rather than a mid-range! (at its times I mean... nowadays it ain't even worth considering). ok, I bought it as a low budget transition card, but still...

    I've been following Phoronix for quite a long time, but I didn't get that open source drivers are 3D capable in R600/700
    They're even capable of running games. I guess that 3D performance is lower than fglrx... but what about quality comparison? and features?

  8. #8
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    Quote Originally Posted by TeoLinuX View Post
    I thought that my HD3650 would have been nearer to the HD3850... it's almost half the performance!
    It's quite a low level rather than a mid-range! (at its times I mean... nowadays it ain't even worth considering). ok, I bought it as a low budget transition card, but still...
    The 3650 should be about half the performance - it processes 8 pixels per clock vs 16 for the 3850, and does 120 shader ops per clock vs 320 for the 3850. Memory bandwidth is also about half.

    The 3650 vs 3850 numbers seemed about right given the hardware differences.

  9. #9
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    Interesting would be to compare those Result with fglrx results

  10. #10
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    Quote Originally Posted by bolzerrr View Post
    Interesting would be to compare those Result with fglrx results
    +1

    Exactly what I was thinking. It would be nice to know when we are nearing (maybe even exceeding at some point?) the performance of the official drivers.

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