hello i have built my new pc and am using just one monitor at the moment because my gpu (msi gtx 970 gaming) only has 1 hdmi output but my to monitors need 2 hdmi so i went to plug it into the hdmi on the mobo (msi m5 z170a) but my tv says no signle i have tested with other things like my console (xbox one) and it works can i not use the mobo out put if so how do i use both my monitors ??? pls help