My video card is: ZT-70303-10P NVIDIA Zotac GeForce GTX 770 2GB AMP! Edition Windows 8.1 monitor 60hz The image of my monitor blinks, sometimes when I watch a video on the Internet, flash when the video starts and when it ends, as if the flash change a certain "state" image. And video on Computer too, this occurs. How to solve this? Thanks.