[Tiwaz]

You mean horizontal tearing? I only know of vertical tearing. You can preclude this by enabling Vsync in your display properties. If that option isn't there, you can try enabling it with a utility such as [url=http://www.guru3d.com/rivatuner/:ab391]Rivatuner[/url:ab391], a very handy tool for tuning your graphics card drivers and optimizing performance and or image quality.