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Graphics cards are specialized electronic components designed to accelerate image rendering in computers. They form an integral part of the computer's visual system, working in tandem with the central processing unit (CPU) and random access memory (RAM) to generate high-quality images and videos on screen. Graphics cards enhance the performance of computers, particularly in tasks that require heavy graphical processing such as gaming, 3D modeling, video editing, and computer-aided design (CAD). They come in various specifications, with different memory sizes, clock speeds, and architectures, catering to diverse user needs and budgets. Despite being primarily associated with computers, graphics cards are also used in other devices like webcams, printers, and gaming consoles for enhanced visual capabilities.