I haven't seen the 300 with 175 frames per second capability. Mine has the nice Nvidia Gsync feature (it's a predator) but your LCD appears to be just 60Hz. https://community.acer.com/en/discussion/535440/how-many-hertz-is-the-acer-predator-helios-300-screen
That means 115 frames are lost per second. There's little reason to create more frames than you can display.
i bought a new Acer Predator Helios 300 then i played my first game of paladins on it it gave me 175 fps which is max for the game after that whenever i play i get 60 fps no matter what i try tried turning v sync on off and sorts of other stuff no change

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