Hey so i got a new gaming desktop about 6 or 8 months ago and I have one monitor hooked up with the hdmi to the graphics card which is a gtx 950 but I need to hook up a 2nd monitor and the only other hdmi port i have is an the mobo and I don't know how to activate the other monitor. I have tried to go into my settings but it cant find the monitor. btw I have windows 10 and I don't know what mobo because this is a prebuilt.