I know there is a few threads on this but I can't seem to find an answer.

It never happened on my old ATI raedeon on windows 7 but ever since I started playing again with a GTX 770 on windows 8 it happens now. IT happens randomly, mostly when im in cities however. But in dungeons and free roaming it happens too.

I have tried:
  • Reinstalling the game
  • Reinstalling windows 8.1
  • Updating Drivers
  • Using Beta drivers
  • Downgrading Drivers
  • Running 5 passes of memtest86
  • Changing compatibility to windows 7
  • Reinstalling from online and from the game disk
  • CheckinG GPU temps (which are around 50 full load)
  • Checking CPU temps (50 full load)
  • Updating Audio and Motherboard drivers..

I'm so lost, I just want to play the game and I don't know what to do...