So, I have two Gateway monitors, they only accept DVI and VGA. My Graphics card (AMD Radeon 7850), only has a DVI and HDMI port. I have them both connected, one directly, and one via a HDMI->DVI converter. I have a third, lower-res monitor, that accepts VGA and DVI, how can I connect it up to this setup? I'm willing to buy another graphics card, but does it need to be the same one?