So if the video card isn't working, it's probably more an issue of the motherboard preferring the on-board graphics. If this is a thing, it's usually configurable thorugh BIOS settings.

If your NVIDIA graphics card is not detecting HDMI monitors, here are some troubleshooting suggestions you can follow to fix the issue.

Visit your graphics card manufacturer’s website and read the specifications of your graphics card. If it does not have DirectX 11 support, it is time to purchase a new graphics card.

It looks like older radeon pcie 2 cards may not work but I'm having a really tough time seeing for sure. What works really work in my case, just minimal functionality.