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Surrat

macrumors 6502
Original poster
Jun 20, 2014
478
171
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?
 
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?

Flash the GTX 770 I guess.
 
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