Monitors and video cards: What is the difference between VGA and DVI?
Video Graphics Array (VGA) is based on an analog signal. With VGA systems the signal is converted to analog as it leaves the graphics card for the purposes of sending it through the cable, then converted back to digital format at the other end, over in the monitor. Digital Video Interface (DVI) signal is mapped to the physical frequency of the monitor’s pixels. DVI provides a cleaner, faster, more precise display with hardware that supports it properly.
