EFI Boot Win81 with non-EFI vid card

Discussion in 'Windows, Linux & Others on the Mac' started by Surrat, Jan 31, 2015.

  1. Surrat macrumors 6502


    Jun 20, 2014
    United States
    As an experiment, I installed windows 8.1 on my mac pro 5,1 in EFI mode, its working perfectly and I have had no problems at all. I used the old ATI 5770 mac card to run this install since its an EFI card.

    When I tried putting my unflashed PC GTX 770 card in, win81 just goes to a black screen. I'm assuming it cant detect the video card.

    Anybody know a work around to get my PC GTX 770 working with win81pro in EFI boot mode?
  2. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
    Flash the GTX 770 I guess.

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