If you have a graphics card make sure you are using the input that is on that and not the ones on the motherboard.
The GPU ones will be the ones in the expansion ports and not the ones grouped with the USB, Nnetwork and sound ports.
Ok, then that is the issue. they only problem is i dont see any dvi ports on the graphics card.
Actaully I see 2 DVI but they are DVI-I and DVI-D, but I the cord I have doesnt fit. (Sorry im a noob) and I have a GTX 760 if that helps.