Just a small update:

The AA modes causing this strange behaviour are:

2x
2xQ

Modes that do not cause the problem:

Application controlled
off
4x

I haven't tested 8xS but I presume it will work as well.



The nVidia control panel can be reached via:


Desktop right-click => nVidia Display => monitor type

Desktop right-click => Properties => Settings => Advanced => GeForce xyz

nVidia tray icon right click => nVidia Display => monitor type


The tray icon can be activated in the nVidia control panel under "Tools".

Via the tray icon, you can change resolution, refresh rate, color depth, quality mode, anti-alias, anisotropic filtering and monitor orientation.

higher = better quality, lower performance