Question Lags occur when ext apps are running

Dec 15, 2020
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When i play Rainbow Six Siege it doesn't lag, runs very smoothly. (no ext apps are on)
But if i play with Discord or any other external applications (tabstats, r6tracker), it begins to lag a little bit. Even changing volume makes it lag, until the volume icon disappears.
Specs: Win10, i7 2600, rx 580 8gb, 8gb ram, 550psu.
 

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