System Process Using Memory

I see a lot of people talk about the system process and say it uses a large amount of ram when they aren't even doing anything, in my case it stays low except when I launch games.

For example I can run CSGO and system won't budge, then I can run League of Legends and itll jump to around 500-700mb or dayz where I've seen it jump to almost 2gb and dayz will actually go down in memory while system goes up. I also don't see any performance hits and when I close the game out it will shrink down to around 100mb.

My question is if this is supposed to be happening, I've found a fix in where I just disable Superfetch and system will never budge past 0.1mb. However I notice things like Skype will start using over 100mb where if superfetch was enabled it would sit at 35mb.