NVidia driver 344.80 - does it solve FC4 freeze/black screen problems for you?
At the time of posting, the most recent WQHL-authenticated driver is 344.75. It was billed as doing great things for Far Cry 4. However I found it caused frequent freezes, black screens and unrequested re-boots. I've seen posts on various forums, including nVidia's, saying the same thing.
How do I know this driver was the cause? Well, following advice from NVidia itself, I got myself a copy of a nice freeware utility called "WhoCrashed" which analyses your most recent crashes and points a finger at the likely culprit. Here is its conclusion;
Conclusion
3 crash dumps have been found and analyzed. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:
nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 344.75 ,
NVIDIA Corporation)
On that basis, I have downloaded nVidia's latest driver, 344.80 (described as a hotfix, not yet WHQL signed) and thought I would give it a shot. I'll probably report back here with how it goes for me, but feedback from others who have tried it might be useful.
LATER EDIT: 344.80 was even worse than 344.75. Instead of bombing out during the game, it crashed at the start, when clicking on the "Continue game in Offline mode". Maybe I'll go all the way back to 344.65....