First be sure your monitor is switched to the proper HDMI/DVI input. Some monitors don't auto-seek a signal. If so, then it would appear the card is defective or the cables you are using are poor quality.
Hello everyone, i have the same build and the problem, too. How did you find the solution? İ am about to send my entire case to the distributor and it is going to take a month i think. Did you change any parts, drivers or os?