Black screen delay when alt tabbing

Aug 14, 2018
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[Moderator note: moved post to Displays.]

Everytime i alt tab out of fortnite all my monitors (i have 3) goes black for like 3-4 seconds and it's really annoying me, since i do it very often ingame, and sometimes this delay can kill me. I play in full screen because stretched res doesnt work in borderless. However before when i didnt play stretched it was not more than like 1 second delay when alt tabbing (in fullscreen mode).

i have 2 60hz 1080p monitors and 1 144hz 1080p, and play fortnite on 1600x1080p (i just created a custom res in Nvidia controllpanel). But the screen is still using a 1080p res.

Should i change some of my settings?