nvidia driver 295.73 and graphics problems

[Desertowl]

Well, 1.05V did the trick here as well, but I still don't know why changing drivers required manual intervention with the voltage regulation.
However - if anyone else has these problems, it seems like the solution.

thanks to all who helped.

edit - in very intense air combat (enemy plane very close, while firing guns) the artifacts still remains, much less than before and for a very brief time.
should i increase voltage again?