I recently replaced my aging Nvidia 9800 with a Radeon 6970. With my old card, I could run GUIMiner and do work on the computer. If I needed to use more graphical processing power, I would stop mining and resume afterwards. If I pushed the system too hard, the display driver would crash, but it would recover after a couple of seconds.
I un-installed all the Nvidia drivers and the 9800 card and installed the Radeon 6970. The card mines great, but If I attempt to playback a video or go to a website with embedded flash video, the system freezes completely. I have to power down the computer and restart it.
The 6970 is running stock frequency and I tried to adjust power and voltage settings to see if it helps, but nothing has worked so far.
Is it normal for AMD cards to crash the whole system if there is a problem?