I have a GTX 980 ti everything has been fine. But recently when i play games at 3840 x 2160 there will be a small rectangular box a few cm below the cursor that moves with the cursor. Its different for different games, so with DAI its a box with many small different colored horizontal lines. I took a screenshot while in game, but the box does not appear in the screenshot. I have looked on the internet but cannot find any articles that deal with the problem. I posted the thread in this section because its not hardware, its not the TV and its not the game. So its either Windows or the Nvidia software.