Having this exact same problem on PS4 bizarrely, can't find any other PS4 user with the same issue, only PC.
352.86 randomly crashes on desktop on my GTX 780 Classified, I was using 344.something for months without a single issue, but I had lots of crashes playing TW3 in Velen area, so I updated to 347.25, and now it works, I've played for half an hour and visited every single site where it'd immediately crash without a single issue at all!
I don't know if this driver would also lead to other problems later (other games or desktop usage) but for now, i think it's the best of the both worlds for us 780 owners.
(Note: I left GF Experience installed at latest version, didn't downclock/optimize anything and left PhysX at latest version, not the older version 347.25 installs by itself.)
I went as far as I could. Formatted my PC and installed Windows 10 to test. Downloaded some generic drivers, which I've never used before, and got the same results. Game freezes in the fight with the well's ghost. Anything different is that I got some notification saying that my video driver had stopped working and restarted.
I give up. There's nothing that we can do. CDPROJEKT really need to give us a feedback on the subject.