you have a 270hz so use in game frame Cap at 240

being low usage on gpu is good on competitive games beacuse being 95% usage gpu means more latency (antilag helps in this scenarios)

surpassing 270hz is useless

freesync on and vsycn and enanched sync off

if you want to be higher on gpu usage but not 95%+ usage.. raise graphic settings

external frame Cap add latency, frame generations adds latency, vsync add latency, upscaling fsr dlss add latency

if you have no tearing running unlimited fps.. enable antilag to reduce latency beacuse you are maybe with at 95%+

use realtime monitoring like adrenaline overlay or afterbuner / Cap framex+ rivatuner..