What did it look like when it locked up in games?
It might not be the same issue, but I also had a 6800gt with similar temps (80-95 deg) and I found that in XP (not Vista) the PC would crash whenever I tried to play any game, especially in high resolutions. The whole screen would turn purple and I'd have to reboot. This seems to be a pretty common problem after a quick search. I fitted a Zalman cooler to the graphics card last week and now get temps of 40-55 degrees and it hasn't locked up since.
It would just completely freeze, no funny colours or anything. Everything would just stop, including anything i had playing on media player.
^^ agree with bayo000
sounds like could be xp playing up.
Also, do you have the AMD dual core optimizer driver installed? This may well fix the stability problem.
Yep, i had a good search on forums and things before i installed the cpu just so i'd get it right.
I've managed to sort of fix it now anyway. I had a 40gb ide drive lying around so i've installed xp on that and set it as the bootable drive. It's solved all the problems now. The 200gb sata is being used as a 2nd drive cos it's still got all my media and stuff on it. It's still a bootable drive as well as i haven't deleted xp or anything off it. I will get round to formatting it and starting from fresh but not until i can get everything backed up.