Question 240hz + dual 60hz monitor setup

[Nothing Works]

Hello! I am wondering since right now if I have other things running on my other 2 screens (left and right) such as youtube or twtich it seems to make my game super stuttery despite having 240fps constant. I heard its a windows thing where its not very good at having different refresh rate monitor working together. If i upgrade the other 2 monitor to a 240hz will I be able to have youtube videos playing on the side and not have it stutter? Because I ran some test and it seems;

240hz (center) Game
60hz (left) Andriod emulator
60hz (right) Youtbe
Results: Lag

240hz (center) Game
60hz (left) none
60hz (right) Youtbe
Results: Lag

240hz (center) Game
60hz (left) Andriod emulator
60hz (right) none
Results: Lag

240hz (center) Game, Youtube, Andriod emulator both hiding behind my game
60hz (left) none
60hz (right) none
Results: Smooth

Side note: I have gotten it to be able to play youtube and have something else running and not cause it to stutter but its so random, is so inconsistent I dont even know how to replicate it, it just works and the next day it doesnt.

PC Specs:
i9 9900K 5.0GHz
MSI LIghtning Z RTX 2080TI
Trident Z RGB 32GB 3200MHz
GIgabyte Aorus Gaming Master Z390
Corsair RM 850X White Edition
Lian-Li Dynamic White Edition

 

[Nothing Works]

i bought another 240hz monitor, it solved my problem