Alienware aroura r12 no display on new motherboard.

I have an alienware aroura r12 i just put together.   I have an 19-11900kf cpu and 128 gigs of ram with 1000w psu running a geoforce 1660 super gpu.. I can't get any display via hdmi or display port .. im getting so flustered..  anybody got any ideas whats going on?