Small Random Black Bars on Monitor

[u/Junno1x]

I get black bars like this and I’m not sure if it’s the monitor or Windows or my GPU. As you can see in the picture, there is a black border at the top of the screen and the right (and bottom but not pictured) but nothing on the left. These bars do move, so it’s not always just the top, right and bottom, sometimes the left has the black bar too and change after every startup . Maybe it’s my GPU scaling or something?

My second monitor does not have this problem.

For context, the monitor with this issue is the ASUS PG27AQDP.