Hi. I just built a new machine with an ATI Radeon 5850. I've ran the stablity tests in windowed mode for approx 30 minutes with no issues. I then decided to run the stability test in full screen and walked away from the computer for approx 20 minutes. When I returned and looked at the screen, the donut was gone but all the other elements of the test were still there, IE the dragon, the watery effects etc. The temp graph showed the temperature dropping drastically and the framerates were skyrocketing, which obviously indicates the GPU was no longer being driven heavily.
Since this is a new computer with a new card, I need to know if this was just a hiccup or is there something wrong with my system. Thanks for the help, and thanks for Furmark!