Alright so the new GPU came in yesterday. After putting it in and booting up the system, it ended up completely freezing on the lockscreen. I decided to go into the BIOS, and it froze there as well. Long story short, it seems the PCI-E slot started malfunctioning. As soon as I moved the card to another one, it booted up flawlessly with no freezing whatsoever. So the initial problem to begin with may very well have been the slot starting to go bad. Unfortunately I don't have the time to put the old GPU back in this weekend and see what happens, but that's my suspicion right now.
Trying to look for something you haven't done...
One of the few things I can suggest at this point is going back to earlier graphics drivers - it's possible that it broke with a graphics driver update.
Prstorero got a reaction from GoodBytes in Monitor not coming out of sleep
