I've underclocked my Radeon 9800 Pro 256MB quite a bit, and kept the default settings where they are. I set Atitool to automatically load the "2D" profile on startup and it works fine. The problem is that XP hangs when I want to reboot or shut down the computer. It happens all the time, unless I change back to the "Default" profile before shut down. I have a P3 3ghz, newest display drivers from ATI. Any solution?