Minor update on this: I ended up returning the Samsung G80SD since it was being a finicky piece of shit in other ways and got an HP Omen Transcend 32 instead (I know, HP sucks, but I have nothing but good things to say about my HP Omen 27i so I took the chance). Same exact 3rd gen QD-OLED panel but this time it just works™. 240hz, VRR, all good out of the box.

So my point about the monitor is kind of moot, the G80SD just sucks, Linux is fine.

Gigabyte X870 Aorus Elite Wifi7

I tend to avoid Gigabyte, but the only stock of 9800X3Ds available was in motherboard bundles on Newegg, so I ended up with it lol

I also noticed that Bluetooth still isn’t working, so I am still waiting for 100% compatibility.

My old monitor was 165hz and I didn’t expect the jump to be noticeable, but it actually was. It’s definitely well beyond the point of diminishing returns (120 is fine imo), but it’s still a nice upgrade.