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How to tell what type of DVI connector you have on your system
Published Date : 14 Jul 2009   Last Updated : 28 Sep 2011   Content Ref: TEC1484059  


Types of DVI connector

There are three main types of DVI connector that you may see on your RM mainboard/graphics card and they all differ slightly depending on which signals it implements and what type of display can be connected.

Generally with an RM system if the DVI connector is blue it will be DVI-I and if it's white it will be DVI-D.

DVI connector types
  DVI connector types

Some connectors also include provision for a second data link for high-resolution displays, though many devices do not implement this. The connector is sometimes referred to as DVI-DL (dual link).


The types of display that each connector supports

Older analog monitors must be fed with an analog signal (commonly referred to as VGA monitors). Newer monitors can work with a digital signal and some of these digital monitors can work with either type of signal. Some of the pins on a DVI connector carry the digital signal and other pins carry the analog signals.

Mainboard/graphics card connector types:

DVI-I (integrated, digital & analog) 
DVI-I stands for DVI-integrated and outputs both digital and analog signals. It can be used as a VGA port if used with a DVI-I to VGA converter or with a DVI-D or DVI-A monitor.

DVI-D (digital only)
DVI-D stands for DVI-digital and outputs digital signals only. This connector can only be used with a monitor that accepts digital signals (DVI-D or DVI-I monitor).

DVI-A (analog only)
DVI-A stands for DVI-analog and outputs analog signals only. It can only be used with a monitor that accepts analog signals (ie a VGA monitor with an adapter, a DVD-I monitor or a DVI-A monitor). A DVI-D monitor will not work with a DVI-A mainboard.


DVI-I to VGA converter
If you have a DVI-I connector, this supports both digital and analog transfers; you can use a DVI-I to VGA converter to give you a VGA port.
DVI-I to VGA converter
  DVI-I to VGA converter

Possible Issues

Dual display support

If your system has two display connectors, this does not necessarily mean that your mainboard/graphics card will support two displays simultaneously. Due to hardware or software restrictions your system may only support one connector at one time.

More Information

Example I/O panel from an Intel DQ35JO that has a VGA & DVI-D connector
Intel DQ35JO VGA and DVI-D
  Intel DQ35JO VGA and DVI-D

Example I/O panel from an Intel DQ45CB that has a DVI-I & DVI-D connector
Intel DQ45CB DVI-I and DVI-D
  Intel DQ45CB DVI-I and DVI-D

The long flat pin on a DVI-I connector is wider than the same pin on a DVI-D connector, so it is not possible to connect a male DVI-I to a female DVI-D by removing the four analog pins. It is possible, however, to connect a male DVI-D cable to a female DVI-I connector. Many flat panel LCD monitors have only the DVI-D connection so that a DVI-D male to DVI-D male cable will suffice when connecting the monitor to a computer's DVI-I female connector.

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Document Keywords: DVI, DVI-I, DVI-D, DVI-A, dual display, VGA converter, digital, analog, duel

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