Ok this is strange:

When I have load on the card (poclbm) and I try to open Catalyst Control Center or GPU-Z to check the temps, the computer locks up hard. When there's no load, I can open CCC or GPU-Z no problem. Poclbm alone doesn't cause problems, the computer is mining happily at 650+ mhash (-f 140).

Anyone run into this?

Using latest versions of everything (Catalyst 11.6, etc) on Vista x64.

Not being able to check the temps is a tad annoying.