Hyperx cloud core II question for PUBG(and FPS in general)

Apr 17, 2018
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Hello,i recently purchased a Hyperx Cloud Core II headsets as an upgrade from my old Cloud Core one and i noticed it comes with an soundcard
I play mostly PUBG,and i noticed the 7.1 feature is worse than stereo,so i keep it off for that game
Should i completly remove the soundcard from the headsets(which connects via USB) and connect headsets directly to PC with 3.5mm jack or should i keep it,but keep the 7.1 feature off?

My motherboard is B350 tomahawk,do i have better sound with onboard soundcard or hyperx soundcard?