I've got a computer that keeps locking up with my leadtek GE-Force 4. However, the video card works just fine in every other computer I've tried it in. To make it even more frustrating is the fact that I've used 3 different video cards in this computer and it runs just fine. It doesn't appear to be the video card or the motherboard, so what could it possibly be. Also I've reformatted the hard drive and yes I have all the current drivers. The system has been working great, it just started locking up for no reason. Please help I'm confused as heck.