Nividia GPU

I just finished building my new pc. My bios is set to use the pci port to boot display. However, when I check my device management it does not show my gpu. I even verified that the GPU was working by disconnecting it and having no display. I have tried installing the new drivers, but it says no...

So after wanting to upgrade for the longest time ever my friends suggested to wait cause AMD has new CPUs that are constantly out of stock, I finally manage to snag a 3800x. and after installing everything, I was very disappointed to notice that alot of my games run worse than my previous...