should i set these games to high performance mode on windows settings > (fortnite/tomclancysrainbowsixsiege) both cpu intensive games

hi so i have a pc coming soon and i don't really know anything about this setting or what it does i just have it on for my current pc right now and I'm wondering when i get my new is it worth using or should i keep it off, the new pc I'm getting has a 7500f and a 4070 but I'm wondering what the setting actually does, the current reason i have it on is because i looked up videos how to optimize games and i just kept it on ever since but it could do nothing/something or idk.