I’ve been banging my head against the wall trying to achieve this. I play Arkham Knight, Doom Eternal, Dead Space, and GTAV. I’m guessing it depends on the game.
Keep the external display resolution no higher than 1080. Your TV is going to upscale the image regardless and should look pretty good. I play halo infinite at 60 frames per second with it set of 1080 and it looks good. No way you’re going to get it native 4K, every time I tried the games had horrible frame-rate.
Ok quick updates, after some helpful and hurtful feedback this is what I did. I went into settings, turned off auto select for resolution, selected 3840x2160@60, then went into the games I mentioned, selected Native under properties, then for arkham knight, went into the graphics options selected 1280x800 with AA turned off. Max FPS set to 60. Now I am able to hit 60 fps. Sometimes it drops down in the 30s depending on how much ass I’m kicking but I think it looks great. Thanks for all the help!
4k is overrated
From what I have read, no.