I have A-I-W Radeon and used Powerstrip to overclock to 183/183 and have had no serious problems (except since I did it I have had problems pulling down all the links on my Favorites button on IE, sometimes it locks up) don't know if that is associated with it. Only happens after I have had the computer on for a little while.
I want to know if anyone knows of a program that will tell you what your video card is clocking at, though...
Thanks...