Dvi Port Diagram. A single link dvi connection consists of four tmds links. Digital video interface dvi.
The dvi interface is found on a number of devices including tvs computers monitors and video cards. There are five versions of dvi including dvi i that combines digital and analog dvi d thats digital only and dvi a thats analog only. When dual mode chipset detects that a dvi or hdmi passive adapter is attached it switches to dvihdmi mode which uses the 4 lane main displayport link and the aux channel link to transmit 3 tmds signals a clock signal and display data channel dataclock.
Dvi d is the same cable as dvi i without the pins or wires to carry the additional rgbhv signal.
Single link ports possess two adjacent 3 x 3 pinouts whereas dual link dvi ports possess a single 3 x 8 pinout. Even those three types can lead to five different pin outs as you can see in the image below. There are two types in dvi i. Another cabling problem you can have is if windows is set up to use a screen mode which requires dual link but you are using a single link cable.