Just wait. At this time of night many members are either watched videos or are in bed.
My motherboard is it? Which version of Windows? Have you ever had this issue before?
Some video cards are not easy to install. They can conflict with other hardware, unless you install the drivers in a specific order. But without the details of what PC you have, it is just a guess.
First guess. You should have installed the drivers first, then power down and install the video card.. That prevents Windows from messing up the installation. Did you do that? Or did you stick in the cared first?