DVI from GPU works but HDMI from motherboard doesn't display anything.

[ImNotASheep]

So today I bought myself a new Samsung monitor. While my old one was cheap and only had DVI/VGA ports this new one doesn't support DVI, only HDMI and VGA. When i tried connecting the monitor to the HDMI port on the motherboard, nothing displayed on the monitor but when I use my DVI and a HDMI converter to connect it to my GPU's DVI port it works fine.

I have an ASUS motherboard
GTX 970
Samsung Monitor

 

[ThatVietGuy]

Some motherboards disable the onboard graphics in favor of the discrete GPU. This is probably the situation you're running into.

 

[ss202sl]

There's probably a setting in bios to allow dual graphics so you can use both the GPU and integrated GPU.