Problem description: Removed 980 TI SLI setup and replaced with single 1080TI.  Now I can only get 2 monitors to display.  Third one is there but won't extend.

Attempted fixes: Did a full DDU run, same issue.  Installed fresh windows on spare drive, same issue.  Went back to my old windows load and am about to updated the bios on the Mobo, same issue.

Recent changes: See problem.

--

Operating system: Win 8.1 64bit

System specs: evga 1080ti

I have Googled and read the FAQ: Yes

I took my time, installed everything sober.  Pop the old cards out, new card in.  
Black screen on boot.  Reset CMOS and at least that got it to show the bios splash screen.
Went in checked all my boot settings.  Unplugged and tested boot using each drive seperately.
Ended up having to run windows install and do a repair.  Naturally all this did was delete the video drivers.
It appeared to work, but when I installed the new drivers I got to the point I'm at now.
The "non-working" port appears the be the bottom port on the card.
Just wondering what possibilities I'm missing. 

I've done all that, the consistent issue is the bottom port on the VIDEO CARD.
 
edited cause i'm an idiot.  It appears to be the bottom dp on the card, all 3 monitors work fine.

bcavnaugh

veedubfreak
I've done all that, the consistent issue is the bottom port on the monitor.

Then it could be the Bottom Port on your Monitor and not your Graphics Card.

Sorry I had a brain fart, I corrected myself, it's the card that appears to have the issue.