I have the same graphics card and suffer the same severe issues with the DX11 client. When my drivers crash, it force reboots my PC but the drivers for my graphics card do not come back on until I manually reset my system again. The NVidia drivers and the new FFXIV client just don't play nice, as my fiance has an AMD card and has had zero issues despite having a weaker PC than I do.

I don't know if SE will tweak the client or if it's on NVidia to push out a new driver on their end.