Wow cool trick with a GTX 690!

Discussion in 'Mac Pro' started by TheEasterBunny, Mar 23, 2013.

  1. TheEasterBunny thread starter macrumors 6502

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    #3
  2. Nightarchaon macrumors 65816

    Nightarchaon

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    #4
    so all this does is change the ID the card is reporting to the Host system, it doesn't magically make your card perform differently (or better).
     
  3. alphaod macrumors Core

    alphaod

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    #5
    If only we could pull a bunch of resisters to turn those PC cards into Mac compatible cards.
     
  4. TheEasterBunny thread starter macrumors 6502

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    #6
    They really didn't go into performance much but it did enable surround sound on winduhs. On macvideo's link the original author says more work needs to be done if someone wants to donate a card and money.
     
  5. Umbongo macrumors 601

    Umbongo

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    #7
    I think the way he words it means that it doesn't alter the hardware performance of the card, but does allow you to load Quadro drivers and the card is seen as a Quadro.
     
  6. Nightarchaon macrumors 65816

    Nightarchaon

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    #8
    Thats what i mean, there are software hacks you can make to the drivers that are far less expensive that will give the same result, that of installing different drivers, without the potential of ruining an expensive piece of hardware.

    What i am trying to understand is WHY he is going to the trouble of having the card fake its ID to the system when you could just change the software to see the GTX690s ID as a quadro instead.

    Seems ass backwards to me.
     
  7. TheEasterBunny thread starter macrumors 6502

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    #9
    The way I took it was, one of the GPU's was the same GPU as what is in the K5000 that's why it was recognized as such, and why the drivers activated. Not that he fooled the system into thinking it was a different card.
     
  8. ssls6 macrumors 6502a

    ssls6

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    #10
    I think his point is that Nvidia doesn't make that many different versions of their chips in Silicon. They just bin then differently to maximize profit (maybe it was a yield reason to start with that became a profit reason). You change the ID, that turns on different features in software.
     
  9. Tutor macrumors 65816

    Tutor

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    #11
    He fooled the system into thinking that a part of his GTX690 was different, namely, a K5000. He went to the trouble of having the card fake its ID to the system because it would have been much more difficult and troublesome to change the software so that it would see the GTX690s ID as a quadro instead. The software/drivers/installer take their Q from the video card's PCI device id. So he just modified the board that he owned.
     
  10. Umbongo macrumors 601

    Umbongo

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    #12
    Oh right. Well because you haven't been able to do that on recent generations of cards and get the optimized performance of Quadro drivers on a GeForce card. Even when it was easy you didn't get exactly the same performance you'd expect.

    Even with this mod he hasn't shown it actually has any benefit as he hasn't been able to set the Quadro GPU as primary and actually run something like SPECviewperf on it. History has shown that just because a gaming card identifies as, and uses the drivers of, a workstation card that doesn't mean it actually is getting the performance benefits of it.
     

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