What is different between Single Link Digital and Dual Link Digital?

**DVI-D is a digital ONLY connection. The difference between Single Link and Dual Link is that each supports varying resolutions. DVI-D Single Link can support up to 1920 x 1080 at 60 Hz. DVI-D Dual Link can support up to 2048 x 1536 at 60 Hz. DVI cables are used with new video cards for higher resolution over VGA, they are also used with new digital TV's and HD decoders.