At one time less FPS in Fortnite why?

Moin people, I have since yesterday suddenly only 30 FPS in Fortnite sometimes I have ingame 100 FPS and dan suddenly the rest of the round about only 30. I have my PC already zurüch set but without success. Admittedly, I had tried last night to boost my FPS something which made them even worse, but I put everything back in the same way as it was before.

In advance, I thank everyone who can help me!

Discord works too.

There are programs that you can use to check how the temperature of your components is so that problems can be identified. Try that!

I'm a bit surprised: /

Install MSI Afterburne and see the temperatures and FPS. In addition the CPU and GPU load.