DVI Cable Assembly: Un Ultimate guide on DVI cables

About DVI cable assembly, Cathode Ray Tube monitors require analog signals to get image data from the computer graphics card. Here, you will need DVI cables to convert the original digital signal into analog to support these CRT monitors. Similarly, digital display devices like LCDs needed to be compatible and adapt with analog source devices like old computers. As a result, the analog output signals were converted into digital. Also, when LCDs were introduced as digital display devices, they needed to convert analog output signals into digital ones. As both computers and LCDs accept digital signals, there was an unnecessary conversion of signals from D/A to digital. Further, the process also made the signal weak and low in quality. The DIV digital connection eliminated this conversion process and minimized the information loss and accuracy.

The versatile nature of the DVI interface gave manufacturers the flexibility to support digital devices and be compatible with analog devices. How does the DVI cable assembly make things happen?

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DVI Cable Assembly: What is DVI?

DVI is an abbreviated form of Digital Video Interface. It maximizes the flat panel of the LCD and Video graphic cards. The DVI format has replaced the Plug & Display (P&D) standard or an advanced version of the DFP format. Video cards have one or more than one DVI output port.

Apart from being a typical computer interface, it was a digital transmission method for High Definition TVs and other displays. Even the topmost DVD players had DVI outputs, the component video output (analog). However, today, the DVI is used explicitly for computers only, and the High Definition Multimedia interface has become more popular for TVs and DVDs.

DVI Cable Assembly:  Dvi digital pc video connectors

Caption: Dvi digital pc video connectors

DVI Cable Assembly: What are DVI connector types?

DVI-I, DVI-D, and DVI-A have different pins for digital and analog signals. Equipment manufacturers use DVI ports with open pinholes to support both digital and analog signals. DVI connectors with open pin holes do not mean they will support both digital and analog signals. It pins defensive measures to avoid pins breakage if you accidentally insert the wrong cable. You can verify the DVI connector either through its label or manual.

Let’s understand these three DVI formats in detail.

DVI-D: Truly Digital Video

DVI-Digital cables set a direct digital connection between the source and LCD or liquid crystal display monitors. As a result of direct connection and digital format, you get high-quality video displays too fast. The video cars first create a digital signal of videos. 

A VGA output converts this digital signal into analog, which travels through the cable to the LCD display. At the receiving end, the signal again converts into digital. However, DVI-D has no such conversion process as it sets direct connections digitally.

DVI-Analog: High-Resolution analog

When connecting a VGA monitor to a DVI computer, you will need a DVI-A cable, as both these ports carry the same signal. The DVI-Analog cable has DVI signals to analog displays like LCD and CRT monitors. However, you will experience some signal quality loss due to the conversion from D/A.

DVI-I: The best of both

DVI-I (digital and analog) cables can transfer D/D or A/A. The versatile nature of these integrated cables makes them suitable for both digital and analog situations. 

You must understand that you cannot interchange DVI analog and DVI digital formats, meaning a DVI-Digital cable assembly will never work for a DVI-Analog system. You will need a VGA to DVI-Digital converter for connecting an analog device to a digital system. Similarly, you will need a DVI-D to VGA converter to connect the digital source to an analog display.

DVI Cable Assembly:  computer connectors for connecting monitors

Caption: computer connectors for connecting monitors

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DVI Cable Assembly: What are single links and dual links?

There are different forms of DVI digital formats, namely, DVI-Digital single link / dual link and DVI-Integrated single link cable/ DVI-I dual link type connectors. The DVI cables transmit information through TMDS. The cable’s bandwidth capacity makes the single and dual-link different. A single link cable uses only one 165Mhz TMDS transmitter, and the dual link uses two. As a result, the latter becomes more powerful and transmits information at incredible signal quality and speed. For example, a single-link DVI can give a low resolution (1920*1200) compared to a high resolution (2560*1600) of a dual-link DVI.

Are single-link/ dual Link Digital Visual Interfaces compatible?

You can use a dual-link in place of a single link, but that is not possible vice versa. Similarly, you can use DVI-I cable assemblies for DVI-D cable assemblies. If you use dual-link connectors for single-link purposes, the PIN on the female connector will be the limiting factor.

What is an M1/P&D/30-Pin DVI connector?

When a connector’s width is more than a standard DVI connector, it is a VESA P&D connector. You can also call these 30-pin DVI M1 connectors, and you can find them in projector breakout cables carrying digital and analog video signals.

How do you connect DVI and VGA?

Depending on the connectors present on your display and the source, you can convert:

When the source is DVI and the monitor is VGA: You will require a DVI-to-VGA adapter for a DVI-I source. On the contrary, you will require a DVI-D to VGA adapter for a DVI-D source.

When the source is VGA and the monitor is DVI: In this case, you can use a DualHead2Go VGA to Dual HDMI/DVI Converter or VGA to HDMI/DVI converter.

How do you connect DVI and HDMI?

You can convert DVI into HDMI through an adapter or a cable.

How do you connect DVI and DisplayPort?

Use an adapter that connects DisplayPort to DVI to connect the DisplayPort source to the DVI display.


DVI cables can improve the visual and photo quality of your electronic devices. Choosing the wrong cable will not disappoint you in picture quality, but it can cause damage to your ports. Get the help of professionals to select the right cables for your job. 

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