Having this exact same issue with the same card. Tried the clean install as well, and I still get random freezes for ~5 sec, followed by the "nvidia display driver crashed and has recovered" error about half the time whenever I'm in an instance. Thankfully I think it's only done it in Coil once, but still. Was running fine on the same driver then it just started doing this out of nowhere a few weeks ago. It's only nvidia cards doing it too...eventually I just send evga (my card's manufacturer) an email and got them to send a replacement card within about 15 mins to check if my card is faulty. Haven't installed it yet but I prolly will tomorrow...not expecting much based on how widespread this issue is though. I'd like to see if anyone has solved this issue through other means though, because it's pretty gamebreaking.