Hi, I've got a Mac Pro 5,1 (mid 2010) and I've put an Nvidia GTX 770 in it and I'm trying to get it to work in Windows 8.1. I got into the installation yesterday by booting off of the W8.1 DVD with the 770, but I had to exit it because I had multiple drives plugged in and it wouldn't let me continue, so now I've unplugged everything but the the drive I'm trying to install on and I believe between that time period I also did a PRAM reset by holding down: Option, Command, P and R. After all that I can't get anything to appear on screen it's just black no matter what I do, I've tried a GTX 980 too so it's obviously not the graphics card. The only way I can get any kind of picture on the screen is if I use the stock ATI Radeon 5770 that it shipped with. I'm so lost now and I have no idea what I should do.
I will answer any additional questions people may have.
Thank You
I will answer any additional questions people may have.
Thank You