Do you consume more cpu power when you play Fortnite on high instead of medium settings?
Yes of course
And why does the cpu get more busy?
Yes, you use more power.
The data for your GPU is preloaded in the CPU.
Therefore it is also important to have a good CPU. For example, if you If you have an i3 and an RTX 3080, your GPU won't even be able to run at half performance.
Oh, I understand
Because the CPU is the central processing unit and the graphics card only serves to display everything as an image.
With higher settings you have to calculate more because everything is shown more precisely and things like gravity or moving objects
OK