Hello all, my screen has been splitting in two randomly along with extreme amounts of noticeable pixels and what looks like tearing and blinking. Sometimes it has a imaginary vertical line that can't be crossed with the mouse pointer unless I move it to a horizontal border, which makes the mouse pointer appear on the opposite side. This only began to occur while playing Fallout 1 and at first I thought it was an in-game issue, but it seems to occur on my desktop. I don't think it's a monitor issue since it is a BenQ XL2420T and can run 120hz no problem. I am not overclocking at all either and my GPU is an AMD 6870. Please, if anyone out there can help, I would greatly appreciate it.

This is a couple of images of the problem: http://imgur.com/4lxMfmU,o0m9JD8#0