My monitor has been acting up recently. I spent a few hours trying to fix my monitor since it got a black screen. I found out that the problem was with my monitor using 144hz. It is a Asus vg248qe so It definitely can go 144hz, but whenever i set it at 144, it ends up having massive screen tears and goes black every few seconds. I have a Gigabyte GTX 970 windforce, and again, my monitor is the ASUS vg248qe