Fortnite on optimal settings?

I have a question about the online game Fortnite. In the graphic settings it is possible to set the settings to optimal. When I do this, the game is already pretty strong. Does anyone know this and knows how to get these settings to work, because always playing low is also a bit boring.

You'll probably be a PC and then it may be that the graphics are too high for your PC. If you have a PC check what video card and processor performance you have.

You can only get it up and running if you buy better hardware, since your current one probably can't do that

Thanks, however, as soon as I press the option I think the graphics will be adapted to my graphics card.