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 When I output to a TV, why are there black borders around the video?

The black borders you see on your TV screen are caused by underscan from the TV encoder on your graphics card.   Underscan occurs when a video signal does not reach the edges of your monitor and leaves a black border around the image. Normal broadcast TV content is "overscanned," meaning the image bleeds/scans past the edges of the screen so it fills the entire monitor. PC monitors usually will have a 1" border which is not viewable.  Video cards compensate for this by creating a black border which you don't see to fill the border that is not visible.  This black border appears on your TV.  A feature called overscan in nView display mode can compensate for this.  If you have an older card that doesn’t support this, there is a free utility you may download called TVTool.  This will allow you to enable overscan so that you can view the display on your TV full screen.  You can download this utility from:

 

http://tvtool.info/index_e.html







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