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Any questions not answered in this tutorial and the page linked to at the bottom should be directed to the manufacturer(s) of the equipment being connected.
 

Analog Capable DVI Connectors

The main distinguishing feature of analog capable DVI connectors are the 4 pins orbiting the horizontal bar. These are there in order to use a device or display w/ the proper port with legacy analog displays or devices. This adaptor is one example. It is most frequently used with outputs on video cards going to legacy VGA monitors. On the images below the pins on the plug and the holes on the jack are shaded with bright green.

Plug Jack

Digital Only DVI Connectors

Digital DVI connectors often look the same as their analog capable counterparts but lack the 4 pins orbiting the horizontal bar. These can be used only in conjunction with digital devices and are not compatible with adaptors for analog-only devices. In the pictures below notice the horizontal bar which is shaded with bright green and how there is nothing orbiting it.

Plug Jack

Single link DVI connectors

Single link DVI cables and devices use a total of 18 pins for the main video signal. The main distinguishing feature of most single link cables is the 2 column gap separating the two clusters of 9 pins (3 columns each) on the portion of the connector that is adjacent to the horizontal bar. Though some cables and jacks will have all 24 holes or pins present, they might not necessarily be wired. Single link only jacks will not accept a cable that has more than 18 pins. Single link ports and plugs can carry up to 4.5 GBps of video data. Though most devices are now manufactured with 24 hole connectors, there are still many out there that will only accept an 18 pin plug. In the picture below of the single link plug note the two separated fields of pins which are shaded with bright green.

Plug

Dual link DVI connectors

Dual link DVI cables and devices use a total of 24 pins for the main video signal. Where there was a gap on the single link connector there are 2 columns on the dual link. Dual link ports and plugs can carry up to 9.9 GBps of video data. In the picture below notice the 2 columns (6 pins) which are shaded with bright green in the middle.

Plug Jack

M1 Connectors

Though very similar looking to DVI connectors, M1 has a total of 30 pins in the main field rather than the standard 24 found on a dual link DVI. These are used by certain projector manufacturers. M1 can carry both a video and a control signal. In the image below note the additional 6 pins in comparison to the image of a dual link DVI connector above.

Plug


For a much more technical (and detailed) explanation of the many DVI connectors and their capabilities visit http://en.wikipedia.org/wiki/DVI-D.

 

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