I would kill for my son to try to get me to play ANY video game with him, let alone BG3. I started playing D&D and video games over 40 years ago. He’s lucky to have a son like you. Hope you guys can figure this out.
It’s like these gaming companies have NO Q&A people at all. Build a lab with a bunch of varying levels of machines and see if the game is playable. It’s not really that difficult is it?
I had to go digging but 3840x2160 is both 2160p AND 4k UHD. 4096x2160 is something called 4K DCI which is more of a camera or film industry thing and is rarely used for things like TVs or video games.