I know one guy had a problem with RAM after fitting the AGP card, and changed the RAM as the two sticks were conflicting with each other, but they work fine now, and the problem with them was the dreaded blue screen of death. Now he has the same problem as the other guy - the PC just shutting down when playing games. This sounds a lot to be to do with insufficient PSU As the problems with both (shutting down) have only been since the AGP cards have been fitted and running.