I want to switch from Fortnite to Teamspeak. But then I have for about 1.5 sec black screen and then go again.
What can I do?
You probably change the resolution. Can't you play Fortnite in the frameless window? That would solve your problem.
I have 1920x1080 everywhere
Then check if Fortnite has "Borderless Window Mode".
OK
Ok it helped.
Very much!
A quick tip would be to simulate full screen, that is to play in the frameless window. That will reduce your FPS, at least for the most part.
When a PC switches from full screen to its windowed mode, it has to recalculate the graph. This leads to a short black screen.
You can fix this by either always staying in full screen or using the window mode for everything. Duration full screen is impossible with Windows.
Windows will temporarily switch to windowed mode, even when switching between two full-screen applications, doubling the delay rather than canceling it.
In short: Use Linux with KVM.