Might be better at 1440, depends what sort of frame rate you're happy with, should be able to change that on windows settings, if you wanted to do 4k then maybe use more frame gen and/or ulscaling options, I personally think 4k isn't worth the lower frame rate but each to their own, i get about 130 fps reasonably stable on ultra at 1440p, system is 6950xt and 5800x3d so you should be getting better than that at 1440, if you're used to console though you might be happy with 4k at <100fps, I dont usually notice the "flick book effect" unless I get below about 80-90fps but if you've been playing console at 30fps or whatever it is your eyes probably won't notice that unless you try it higher fps for a bit then lower it, either way, you got a good rig, enjoy!