Cheers for clearing it up Toni, must report that it seems to be working now with 16273 without an nvidia driver update, so maybe it was a windows problem more than a driver issue.
Going to brave 385.41, but 385.28 seems fine
Edit:
Still fine.
Code:
VSync calibrated: 50.001026Hz/1.0=50.001026Hz. MinV=1 MaxV=1079 Adj=3187 Units=78123 89.0%