I just got a  6970(was in the market for a new card anyway and i figured might as well get a badass miner too) and the speeds are great getting close to 400mh/s. However since this is my actual computer I would also like to be able to ya know...do stuff while mining.   With my old card(nvidia 8800 ultra) I was able to mine(slowly) while browsing, watching movies etc. With the 6970 however if i watch any kind of video (youtube, or a video clip mrom my HDD) while mining the Screen locks (cant move mouse etc, audio on video still plays) and i have to hard restart it. Im still able to browse the web(although obviously no youtube), and listen to music while mining.  Using GUIminer on windows7, if that is relevant.  Any help would be seriously appreciated.