For almost a year i had been using my monitor that has a DVI-D port with a gtx960 that has a DVI-I Port. Today i have used an adapter from DVI-I to VGA and conected my old CRT monitor, it runed fine so i dissconected it, but when i tried to conect my DVI-D monitor it just dosn´t work, it says "No Signal" and as I said i've been using it for almost a year from now. I think it may be that the card is sending Analog signal trought the DVI-I port no matter what monitor i connect. I don´t know what to do now :'C