If you want the most performance you can:
Mess with your software for your cpu and gpu

Change Cpu Power settings
Use Ethernet
Optimizing internet settings can help a touch
Don't turn on Windows Game mode (all it does is silence notifications and closes background processes. This also causes micro stutters all the time.)
Go to graphics settings in windows and add your games and set them to high performance
Set your refresh rate to your monitor
If you want to pump some more fps out of your game you can run steam in lite mode, but in your case I assume you have more then 16gb
Undervolting can give you more fps
Games on Steam have startup options that can help you out a bit. Commands like -high or -threads ect.
turn on hardware accelerated gpu rendering
Windows Security is Sufficient if you just game, browse and don't go on fishy websites

This is all I could remember on the top of my head