I have a dark desktop wallpaper and usually only have the browser window on the left side of the screen. Once or twice a minute I see a thin white line flash somewhere on the desktop part of the screen. What can be causing that? Is my GTX 1060 6GB on its way to GPU heaven? It is a couple of years old, but this is the only "problem" I have seen so far. Or could it be caused by the monitor or Windows?