Mac Pro 1,1 and GTX 680

Discussion in 'Mac Pro' started by King Aleksandar, Mar 23, 2017.

  1. King Aleksandar macrumors newbie

    Mar 23, 2017
    So I have a MacPro 1,1 and have recently purchased and EVGA GTX 680 2GB, I am just wondering, if I flash this card and am running OS X 10.11, and therefore have a boot.efi which is technically EFI64, will I get boot screens from this card on my Mac?
  2. King Aleksandar thread starter macrumors newbie

    Mar 23, 2017
    So I shouldn't flash the card?

    If I'm on OS X 10.11 on the MacPro (1,1), can I just use it as a PC card (with no boot screens)?
  3. Robert Davies macrumors 6502

    Robert Davies

    Jul 28, 2011
    People's Republic of Wrexham
    A 1,1 and 2,1 only has a 32bit EFI. There is no point or any advantage in flashing the card with a 64bit Mac EFI. You will NOT get bootscreens.

    I've done it. I flashed it back to its original PC firmware.
  4. owbp macrumors 6502a


    Jan 28, 2016
    Belgrade, Serbia
    Yep, what @Robert Davies said, your Mac still has 32 bit EFI, it's just "calling" 64 bit OS through modified boot.efi file.
    Also, nVidia with Mac EFI will give you 2.0 PCIe speeds in Bootcamp (you'll get them in OS X through web drivers), but since 1,1/2,1 have only PCIe 1.1 slots, there is no gain in that either.

    Use it as a PC card and all will be ok. I've spent too much time on HD6850 EFI rom before i realized it is 64bit :D
  5. CapnDavey macrumors 6502


    Apr 11, 2015
    You can flash the card to use later in a newer mac pro thinking ahead is always better

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5 March 23, 2017