Its definately not his powersupply, since that card doesnt use that much current. If it was the PSU, the entire system would be unstable all the time, not only during games. The latest drivers won't be too much help for the card either, since they have stopped supporting it since the old detonator driver days. Did you install the drivers over the top of the old ones? If you did, that can sometimes stuff it up so try uninstalling your drivers and then run driver cleaner to remove all registry instances of the old drivers. Then reinstall the new ones. And if that fails, weirdy is right, get another card. Even an ATI 9550 would give you a massive increase in fps, and they retail at around 80 dollars australian, around 50 bucks US.