My graphics card has one DVI and one RGB, so having dual monitors is no problem. However, the color difference and brightness lacks on the RGB connection, and dont want to go out to buy a new graphics card when this works fine. The computer lab at my school has some comps that have a graphics card with one DVI port, but it has a DVI split cable which allows it to have dual monitors that way. What is this called and where can I get them? Thanks alot.