On the back panel of this computer (XPS 8900) my monitor is plugged into the HDMI display port #4.

This computer has the NVidia GeForce GTX745 graphics card that's installed into one of the PCI expansion slots.

My question is, am I really plugged into the NVidia card OR is there another on board video display that I'm using because I'm not plugged into the video card?

Thanks,