Do you have Steam in Offline mode, or does it update before you can do that?
WTF!!?!!? Its working now. The PhysX options werent appearing in the NVidia Control Center but they are now (?!) Just went out had a couple of beers, came home, booted and now its working. Ive been trying to do this all day. LOL!
Fluidmark just showed hardware, and drivers are 197.##.
Two word. Ball-ache.