Ok I’m using a 2080 Super at 1440p. If I use my current game as an example COD MW I average 120-130fps using high settings, not ultra and with Ray Tracing off. If I start pushing up settings to ultra it drops to 100-115 depending on the map. Gears 5 I have played a lot less but that was similar results from memory. A lot will come down to what settings you want to run.
Edit: I meant 1440p not 4k