That will not help i would say ,at this point OBS is simply to inefficient. He does play in 1080p (so the game is most likely low stress for that GPU) and does upscale to 2160p.If you have 96% GPU load trying to do 60 FPS, you either need to reduce frame size, reduce quality options in-game, cap in-game framerate, or not do 60 FPS.
Schapochka can try his luck with xsplit, if that won't work too, Geforce experience is the only way to do 2160p