New
#11
you can overclock fine with att. i can see the calculate button, and mine is greyed out too - i've never really noticed it tbh, and don't know what it calculates.
to overclock, slide your slider, then hit the 'apply button' at the bottom right - then save your overclocked profile, making sure you have the 'include clocks...' button checked. your saved profile name should now include some numbers relating to your tweaked speeds.
i've not had ccc for years, and whilst i haven't had to overclock my new card yet, i have used att to clock all previous ati cards with no problems.