What is a DVI to VGA Adapter?
Let's face it -- computers are confusing. The situation is not much helped by the fact that all parts, pieces, and fragments are categorized via practically incomprehensible acronyms, seemingly for the sole purpose of allowing those in-the-know to banter about while keeping the rest of us downright baffled. To break the vicious cycle of computer illiteracy, let us begin by explaining one of the more common parts required by today's PC user -- the DVI to VGA adapter. What is it? What does it do? And for that matter, what is DVI or VGA? Read on and find out.
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What is a DVI to VGA adapter?
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Put simply, a DVI to VGA adapter allows interface between a VGA monitor (and monitor cable) and a DVI input on a graphics card. When connecting a monitor to a PC (more specifically, the graphics card of the PC), both inputs have to be identical to allow the two to "talk" back and forth. Newer monitors and graphics cards all adhere to the DVI standard. Older monitors (those larger, bulky cathode-ray tubes) used the VGA standard. The adapter comes into play when attempting to connect a VGA-only monitor to a DVI-only graphics card.
How does it work?
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As seen in the picture, the DVI to VGA adapter has two sides -- one side contains a male DVI connector, and the other contains a female VGA connector. The male DVI connector of the adapter is plugged into the female DVI connector on your computer's video card. After screwing the adapter in tightly, the male end of the VGA cable from the monitor is attached to the female end of the DVI-to-VGA adapter. The adapter acts as a translator, converting the DVI signals sent from the computer into VGA signals that can be understood and displayed by the monitor.
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But what is DVI, anyway?
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DVI stands for "digital video interface," and is designed to take advantage of the display properties of flat panel and LCD monitors. DVI uses a digital signal, as opposed to the analog signal used by a VGA cable. DVI provides better picture quality and a sharper image. Almost all new flat panel and LCD monitors operate by using the DVI format. But, it should be noted that the DVI format has, in fact, been surpassed by a new format, HDMI (high-definition multimedia interface).
And what is VGA?
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VGA (video graphics array) was the gold standard prior to the development of DVI. As stated, it operates using an analog format, which is a signal composed of a constant stream of electronic waves and signals. This is contrasted by the digital signal used by DVI, which is actually just a series of pulses in binary (the most basic language of computers which represents everything as a string of zeros and ones). As digital monitors (LCDs and flat-panels) were developed, VGA proved unable to transmit the necessary signal, prompting the progression to DVI.
Considerations
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Regardless of the fact that DVI is the more advanced technology, a number of people still prefer their old VGA-compatible monitors, which is where the DVI to VGA adapter comes into play. It is also useful when connecting a DVI-equipped computer to a VGA projector. Although seemingly archaic technology, VGA-compatible monitors still generate a wider spectrum of colors, and more accurately reproduce color, making them ideal for graphic (and web) designers. Additionally, fast motion is displayed better on VGA-compatible monitors. An example would be the fast-moving action of a first-person shooter game. For people who prefer the benefits of VGA monitors, the DVI to VGA adapter is a lifesaver.
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