A graphics card is a circuit board that plugs into a computer's motherboard to communicate with the display (screen or monitor) and has processing and memory capabilities. It computes and stores the intensity and color value for every pixel available and sends that information to the display line-by-line while it calculates the values for the next screen. The cycle repeats about 50-70 times per second, to provide a smooth viewing experience.
Keeping the graphics driver, a small program that controls the graphics card's interaction with installed software and with the display, up to date prevents errors such as ghost images and screen freezing. Desktop and laptop computers come with built-in graphics cards, while users with advanced graphics needs such as gamers and graphic artists can purchase more powerful graphics cards.
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