I have both a white line in the top left corner that appears more when I set a higher refresh rate and I also have horizontal lines going through my whole display at any refresh rate. This is something wrong with my graphics card because I don't have these issues when I use my xbox on this monitor and I don't get screen tearing from my pc on my 4k tv either just this monitor.
My specs.
Processor - AMD Ryzen 7 2700Z Eight-Core processor GHz
16G ram
Nvidia Geforce rtx 2
My specs.
Processor - AMD Ryzen 7 2700Z Eight-Core processor GHz
16G ram
Nvidia Geforce rtx 2