Problems audio HDMI and other

[AllIsDust]

Hi, after install Catalina Vanilla, I have a problem with the Audio HDMI, I’ve try any kexts but HDMI doesn’t appears in the sound section, help me please I’m noob.
second problem is the graphic accelerator, I don’t know how ability that function. Help me please
my configuration:
I5 4590
Asrock h97m
R9 280x

 

[edal72]

Try -cdfon in boot arguments if using current version of whatever green.