A good PC monitor is essential if you want to view the true processing power of your computer. In addition, which type of connection you use to hook up your monitor to a PC determines the quality of the output you see. In general, you have a few options when choosing how to connect your monitor to your PC.
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CGA and EGA monitors are rarely seen since the debut of VGA in 1987, according to Softpedia. VGA connections transmit video signals in analogue, much like a television. CGA and EGA use a digital connection, which while more advanced than analogue, produces lower picture quality than a VGA monitor. Some VGA monitors are capable of better resolution and colour quality than regular VGA connections--known as Super VGA.
Digital video interface, or DVI, offers better resolution--up to 1920 x 1200 at 60 hertz--than VGA connections, according to Data Pro. Double-link DVI connections offer even better picture quality, up to 2560 x 1600 at 60 hertz, than single-link DVI. Technically, you are not supposed to run DVI cables longer than 16 feet, but some manufacturers offer cables than go beyond the official standard.
You can also use a high-definition television screen as your computer monitor via an HDMI port. As of 2010, HDMI offers the highest resolution for any type of video display. Computer images, however, may not display properly on a high-definition TV, because televisions are not meant to display video output from a computer. As an added benefit, audio and video are both transmitted HDMI, reducing the number of cables needed.
S-Video or Composite
Computers usually come with an S-video or composite output port. S-Video and composite are poor choices for connecting a video display terminal to a computer, because they cannot handle high-resolution video. Most analogue televisions come with an S-video or composite connection.
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