Question on GPU-Z

Discussion in 'Mac Pro' started by tracer1, May 4, 2017.

  1. tracer1 macrumors member

    tracer1

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    #1
    Occasionally when I have nothing to do, I will go to windows and quite often will check the gpu-z. With the HD7970 installed, the EFI block ( next to save your rom) is not checked. With the GTX970 installed, the EFI block is checked. Just curious as to the difference.
     
  2. h9826790 macrumors 604

    h9826790

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    #2
    Your 7970 may not have UEFI ROM, that's quite normal.
     
  3. tracer1 thread starter macrumors member

    tracer1

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    #3
    so would it be running in legacy & the 970 running in uefi?
     
  4. AidenShaw macrumors P6

    AidenShaw

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    #4
    Or perhaps GPU-Z doesn't understand Apple's proprietary EFI.
     
  5. tracer1 thread starter macrumors member

    tracer1

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  6. h9826790 macrumors 604

    h9826790

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    #6
    From memory, GPU-Z can tell that my 7950 Mac Edition card has EFI. I suspect it only check a particular byte in the ROM, if 00 means EFI, and 80 means legacy. But not really read through the entire ROM to determine if the ROM has a proper / standard EFI part.

    It just tell you if the ROM contain the EFI, but not which mode is running at the moment. If you install Windows via bootcamp, it should be in Legacy.
     
  7. tracer1 thread starter macrumors member

    tracer1

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    #7
    yes Windows is via bootcamp. Kinda thought the AMD would be legacy but not sure on the Nvidia 970
     

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