HPCmonkey

This right here. Do the DDU uninstall. JTC has a phenomenal video tutorial on running DDU to wipe out all the old graphics drivers. Clear out both nvidia and amd drivers, then install from scratch for a clean slate. If you're willing to spend nearly $2K AU buying a 6800XT, then pull the trigger and buy a properly matched kit of ram compatible with your motherboard. It's amazing the odd problems mismatched memory, even different skus from the same family, will cause when you push it. I solved a boot looping PC once just buy swapping out memory. All of it was fine, but it was mismatched like in your BIO. The parts I removed are running happily in donated systems now.

Wifi basically relies on bouncing around walls and through windows or doorways more than it does penetrating walls and floors. It can penetrate some, but you can actually watch your signal strength improve just by opening your door into the doorway.