Do PCI Express graphics cards need to be plugged into the power supply to work? I just got a PNY GeForce 8500 GT to replace my integrated graphics but when I went to install it I didn't notice any conector on the card to hook the power supply up to, and neither did I see a free connector from the power supply either. So should it work if I just pop it into the PCI x16 spot? (Will the mother board power it?) I'm new at this so any one offering their experience and knowlege will be greatly appreciated.