I did, and it works like a charm. I was (at first) leery of loading CCC into my computer - coming from a 7800GT and (typically) nVidia's more stable drivers. So I originally went into this vid card upgrade thinking I was going to stay with CCC and not load in ATT.
Well, I learned to use DCPro when I swapped back and forth from a 9800Pro to an X850Pro and back again. Once I was back into a 9800Pro w/CCC and used Driver Cleaner, it ran pretty damn smoothly.
ATI Overdrive will automatically work your vid card steadily higher until it sees artifacts, and then recommend a speed for your card. It also will apply these higher clocks during 3D applications. Without it enabled, it would run my X1900XT at 500/580. During auto clock, it pushed my card up to 700 (artifacts at 698) and made the HSF exhaust feel like a heat gun (87deg C). I run the card at 648/720 and it's perfectly fine and stable (w/BF2, GRAW, and Oblivion).
PM