I have two graphics card in my computer. Both are G-Force FX 5200 cards, one AGP and one PCI. I had been running two 19" monitors w no problem. I just upgraded to 4 20" Sceptre monitors. My graphics cards each have a VGA and DVI port. The two monitors plugged into the VGA ports show resolution of 1680x1050 and work great. The two monitors plugged into the DVI ports with DVI-D cables show resolutions of only 1280x1024. Why are my DVI ports getting lower resolutions?