What is a video graphics card, and why would I need one?
Standard monitors and TV’s display images with a width-to-height ratio of 4:3. Wide-screen resolution has a ratio of 16:9 or 16:10.Wide-screen displays will “stretch” a 4:3 image to fill the screen which distorts the picture. A picture can be “scaled up” to fill the screen. There is no distortion in this approach, however, large amounts of the picture are cut off or lost at the top and bottom of the screen. Wide-screen displays driven by PCs containing a graphics card, can display a distortion-free wide-screen image. Some graphics cards also allow you to rotate the image as needed for vertical display.
