Suddenly little fps in fortnite?

I swapped my Rtx 2060 for an Rtx 2080 and now I only have 30-50 fps in fortnite. But sometimes also 150 fps and don't know why. With the Rtx 2060 I always had about 90 fps. LG

Is the card used or new?

New

Oh hmm mused I can't help unless you have the drivers. Not install properly otherwise I don't know anything.

Have already reinstalled the drivers but the same problem but thanks

Oh ok sry that I couldn't help: /

No problem but thanks anyway

You're welcome