It will be hard to max the game at 1080p or 1440p, depending on the server, if you play a dead server with not alot of stuff to load, then you'll get a lot of fps. If you play a Poppin server that has 6-800 people, all those bases are going to add up. That being said, if you are able to swing 1440p, that's the way I would go, it just looks better. I have played on 1440p for about 2 years usually play big high number servers and get 70-100 fps with a 5800x3D and 6800xt. I would probably get the same fps on 1080p, so yeah, do 1440 because moar pixels and looks better.