So, I don't see how you could be running on the integrated graphics unless you plugged your monitor cable into the motherboard. There is simply no other way to get that signal to the monitor. I suggest you first make sure your HDMI or Display Port cable is plugged into your 6800XT. Next, boot into the BIOS and check for which graphics (integrated or PCIe) is set to initialize first. You want the PCIe to be first up. Also look for the setting of either PCIe 3.0 or 4.0. Start with PCIe 4.0 first (more bandwidth) and if that causes issues, drop down to the PCIe 3.0 setting.
Now get back to us and let us know if your 6800XT is being used.
As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".