Balex,
I have an Asus 7100 MX and the O/C functions were in a separate Tweak Utility that you had to install separately. Maybe you have a similar setup with your card but forgot to install it when you updated? I am using the Asus drivers and not installing the reference nVidea ones.
Have you successfully oc'd your card before? I tried setting my sliders up on my Asus & rebooting but my performance in the UT demo actually lost a few FPS. Any suggestions, anyone?
nate