I haven't installed the onboard driver for the VGA, so I thinks it doesn't problem with the onboard VGA. Last time I had tried to unplug the sound card from the system unit, and the ATI did well, but when I enable the onboard sound, it also cause the task manager become error, the system slows down, and also when I open the window control panel, the system will restart itself.. Pliz help me, I have already frustated because of this... ARGGHHHH!!!!!! :cuss2: