I have exactly this (AM4, 7800XT, 3440x1440 monitor) running bazzite. Almost every game I have maxes 165Hz, works great for LLM inference too, really the nutso expensive stuff is only necessary for 4K+, which I find diminishing returns at present, LLM training (rent a GPU instead), and probably modern VR. Just to let you know you’re barking up the right tree. :)
Oh, and the 7800XT idles / youtubes ~ 14-20W, 7 with the monitor off. I’m actually using it as a backup NAS / home server in down time, system pulls ~40-45W at the wall and I haven’t even gone deep into power saving as it’s a placeholder for a new homelab build that’s underway.
I run a gluetun docker (actually two, one local and one through Singapore) clientside which is generally regarded as pretty damn bulletproof kill switch wise. The arr stack etc uses this network exclusively. This means I can use foxyproxy to switch my browser up on the fly, bind things to tun0/tun1 etc, and still have direct connections as needed, it’s pretty slick.