What is a DVI?
Digital Visual Interface or Digital Video Interface, better known as DVI, is a video interface standard. It was established by the Digital Display Working Group (DDWG) to maximize resolution of digital flat panel displays. Visual Graphics Array (VGA), the standard previous to DVI, is an analog technology that was designed for cathode ray tube (CRT) monitors. Why the switch to DVI? Graphics cards generate digital signals that then pass through a Random Access Memory Digital to Analog Converter (RAMDAC), where they are converted to analog signals to accommodate CRT monitors. The conversion from digital to analog “slurs” the signal in minute ways that result in a picture that isn’t as sharp as it should be or would be if purely digital. This explains why, as analog CRT monitors became larger and resolution greater, text was not as sharp as it should have been and very small fonts became blurry. A natural progression was to make an industry switch to digital displays with digital interface
