Tried installing new graphics card and motherboard for pc, the pc turns on but the display doesn’t seem to work

Bird’s eye view of pc I was trying to install a new graphics card for my pc (AMD Radeon 6750 XT). I got it to the point where my pc turns on and I can see the graphics card is on by the fact that it’s lit on the side. However, my monitor begs to differ as it does not seem to detect the display port cord hooked directly from the card into the it. I saw some people saying that it could be because of a driver needing to be updated and that I should use an HDMI port to try and get into it and update the graphics card drivers, so I tried that and it wouldn’t display anything with the HDMI either. Does anyone have any advice for how to troubleshoot?