I did some googling, and apparently many people have reported audio crackling/popping with 3070s. I don’t know what your issue is in particular, but I would encourage you to look into MSI vs MSI-X interrupts, see if perhaps the audio part of your GPU driver isn’t using them.
This is old and is talking about running in a VM, but the core bits about checking if MSI-X interrupts are on and turning them on should still apply. …unraid.net/…/55011-solved-how-to-make-linux-gues…
Also worth checking is that you have resizable BAR enabled. Run