DVI Vs VGA

If you take a look at the history of technological advancement, it has only accelerated with time. This is apparent if you take a look at how rapidly a new technology emerges to send the older one into obsolescence. Research and development is constantly on to eliminate the perceived flaws in current technologies. DVI is the most widely used video interface technology that has pushed the older VGA interface into obsolescence. Why is DVI preferred over VGA? That is the question I'll try to answer through the DVI vs VGA comparison presented below.

In electronic devices, the one thing that has prime importance is signal quality. Especially, cables and connectors carrying audio and video signals need to ensure that the carried signal is preserved in its original form, as far as possible. DVI and VGA connectors are two different electronic signal carrier technologies, mainly used in connecting a desktop computer with its monitor. DVI connectors have fast replaced the old VGA technology due to superior overall performance. The discussion below emphasizes the prime DVI vs VGA differences.

DVI Vs VGA Comparison

If you are in a conundrum about whether or not to switch over to DVI connectors on your old PC, then this article will be a helpful read. Let us begin the listing of differences between DVI and VGA, starting from the basic distinction in technology.

DVI Vs VGA: Basic Differences
Let me introduce you to VGA connectors first as part of this DVI vs VGA comparison. VGA (Video Graphic Array) connectors are 15 pin connectors used to transmit video signals between devices. They are used in connecting computer monitors primarily and HDTV sets. This technology was developed by IBM in 1987.

These connectors carry signals in the analog form and are therefore suitable for CRT monitors, but not well-suited for LCD and other digital displays. The video signals carried by VGA cables have an analog RGBHV component and they also carry a VESA display data channel signal. Being analog in nature, VGA signals require digital to analog conversion for transmission. They are also known as three-row 15-pin DE-15 or HD 15 connectors and were extensively used until the introduction of DVI technology which was built to replace it.

DVI (Digital Visual Interface) was developed by the 'Digital Display Working Group' in 1999 to succeed the then widely used VGA technology. They were designed to carry digital signals in uncompressed form. DVI connectors and cables are designed to be compatible with HDMI and VGA. A DVI vs HDMI comparison will reveal how these two technologies are different and the need for compatibility. DVI connectors have 29 pins with capability to carry analog, as well as digital signals. They are used to carry video signals for all digital display devices.

DVI Vs VGA: Resolution & Picture Quality
The resolution, as well as picture quality offered by DVI transmitted signals is far superior to VGA, due to the simple reason that it is digital in nature. Digital signals have an inherent immunity to noise. VGA cable carried signal is subject to distortion from surrounding analog noise, if it's not adequately shielded. However, DVI signals transmit video signals better as they are unaffected by analog noise and offer much more clear picture quality.

DVI connectors are ideally suited for digital display devices. The main difference between DVI and VGA adapters is that DVI technology requires no digital to analog conversion. That is why, no signal information is lost in translation and the fact that they also offer higher bandwidth is an added advantage. If you make a DVI vs VGA cable comparison, you will realize that DVI cables can carry signals for longer lengths without distortion. Hence DVI is preferred over VGA due to its superiority in all respects.

Hope this DVI vs VGA comparison has made the difference between the two technologies quite clear. The main difference is the high quality digital signal offered by DVI which ensures far better picture quality and allows for larger picture resolution.