3x monitor not working

I currently have an amd radeon rx 480 4gb, and have been using a 3 monitor setup for a long time. I was playing GTA V the other day and while playing the game froze for about 2 minutes then my pc crashed. I booted my pc back up to and only 2 of my monitors are detected. i unplugged the 3rd and put it into a different slot and and plugged it into another pc to see if it worked still and it does. I made sure all my drivers are up to date, i rolled back to previous drivers, and nothing works. This has been very irritating for me because i consider myself good at solving problems with tech but nothing i seem to do works. I would really appreciate suggestions, Thanks!