What ps5 games are you playing that get 20-30 fps in performance mode? All the ones I own, which is almost every major ps5 title, has performance modes that either do 60fps dynamic resolution, 1440p60 wrapped in 4k, or 40fps at 4k120, or dynamic 4k60. Some get 45+ on average with unlocked framerate and dynamic refresh rate.
What desktop card do you have? Must be a pretty pricey one to outperform the ps5 at 4k. My 2070 is smoked by the ps5. I’m going to upgrade to the 5070 when it comes out.
Does the ps5 still not support native 1440p? Is that why you pick 1080p?