But games on ultimate? I bet the FPS drops to low values. Try medium settings instead. I found the USB polling rate can make trouble as well.
Story: Gamer wants more responsive mouse or such control and pushes the USB polling rate to 10000's times a second. Performance plummets. That's the tie to your xbox controller.
one second my game is working fine then my frames drop to 4 fps and it lasts a long while like a few days to a week or two. the most recent one happened when i turned on my wireless xbox controller which is automatically connected via bluetooth to my computer. I think it triggered something which capped my fps at 4. I turned on my controller in the fortnite lobby which this happens a lot in fortnite, and affects all of my other games.
my power is on ultimate or whatever the highest is