Which apps do you have running other than Pornhub? j/k.
Antivirus, Twitch, internet browser, Discord. a macro program, and one or two others depending on the game. Just check your task manager for all the threads running concurrently, yes not all are active at once, but enough are.
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https://tr1.cbsistatic.com/hub/i/2015/05/07/3ff024fc-f486-11e4-940f-14feb5cc3d2a/build-xbar.jpg
You can see my sci-fi/WW2 book recommendations.