2 monitors amd setup?

So I have a 144 Hz and a 60 Hz monitor. The problem is that I play streched fortnite and so when I have both connected the res always changes on both monitors. The hz number too. How can I fix that?

"The problem is that I play streched fortnite and so when I have both connected, the res changes on both monitors."

Huh? Can you say that again please

You can set nvidia system controls to only change the res for one monitor. At least that's how it works for me

Thanks, but i have an amd system

So on my min 144 hz monitor I have a different resolution because I move my game wider and when I have connected the 60 hz monitor it changes when I access the other screen the resolution and the hz number