so i have a gtx 770 i only had it for abut a year or so and been running great the other day while watching YT vids the screen went black but could hear audio so i turned it off turned it on and there was no video only audio so i looked on line and found a couple solutions and moved my gfx card to the next pci slot witch fixed it ( or so i thought ) i started playing a game and all of a sudden i got MASSIVE frame drop thinking it was the game i tryed to uninstall and reinstall, it was still doing the problem, tryed other games same problem till one time it i tryed it again and during the frame drop my pc crashed idk whats going on heats fine 40- 60c on average when playing games please help me