Question Games crash in fullscreen but work fine in borderless ?

[Petrashko]

This has been happening ever since i installed a 2nd monitor to my setup, but even if I unplug the 2nd one the problem still persists.

The reason i ask this is that i sometimes play older or indie games that have no borderless/windowed option

I read all the treads about similiar issues and tried all the mentioned solutions. Looking at MSI afterburner the gpu load or temperature is obviously not the problem.
Has anyone found out the reason this happens?

CPU: i5-10400
GPU: RX 480 8GB
RAM: 16GB
PSU: LC Power LC6650 650w

My main monitor is 144hz DisplayPort and the 2nd one is 60hz HDMI if that matters.

 

[helpstar]

Potentially a power issue or the GPU is dying.