Sun Aug 18, 2002 8:08 am
DVI has a lot of pins. The DVI ports on some video cards are DVI-A, which means that they also have the same analog signals that you are used to for VGA in addition to the digital signals. An adapter (such as used with ATI's cards) just brings those analog signals out to a conventional 15-pin VGA connector. These cheap devices are not doing any signal conversion. If you plug one into a DVI-D port (which is strictly digital), you won't get a picture.
You may have to dig in the video card specifications a bit to find out if it will handle two CRTs. NVidia's "Twinview" or ATI's "Hydravision" includes this feature.