The problem is not the 9800gt (well it might end up being a problem too, but not yet)
The issue is your core 2 quad Q8400 which is not up to the task of keeping up with the emulation. Your GPU is only using some of it's performance because it is not getting enough instructions translated in time to be able to use any more.
The issue is your core 2 quad Q8400 which is not up to the task of keeping up with the emulation. Your GPU is only using some of it's performance because it is not getting enough instructions translated in time to be able to use any more.