I have a similar problem. I built a new machine, changed from a 660 TI to a 270x graphics cards, which are neck and neck in performance.
But on my new machine, SketchUp looks horrible.
Ive got the latest drivers, hardware acelleration and nothing else checked in preferences, with the highest quality selected. Tried other threads like here like
http://sketchucation.com/forums/viewtopic.php?f=15%26amp;t=57614%26amp;p=524089%26amp;hilit=Anti+Aliasing#p524089
except I didnt try the registry delete thing,Im a bit nervous about doing that.
Anyone had anything similar happen to them, and where they able to fix it?
I should say Im using Windows 7 64 bit in both cases.