Just ran smxi, used it to dist-upgrade, install the newest Kernel (to replace the 4.0 that I had compiled), continued to the graphics and tried to install the latest beta driver. Was told the latest driver was 352.xx and there was no beta driver for my card available at the moment. Told it to go ahead and was informed I have an xorg version that is to old. (1.17.1? maybe?) Anyway, reran it and chose current nvidia driver and it reinstalled the 349.16 driver just fine.
I will try to get some answers from 'h2' in the #smxi IRC channel later today. Right now need sleep!

I did verify that I can still use Steam and play my favorite game, The Talos Principle.
Check back in a few hours, I'll see what I can do...