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Graphics cards, also known as video cards or GPU (graphics processing unit), are expansion cards that can be added to a computer system to enhance its ability to render and display images, animations, and videos. They are designed to offload the processing of graphical data from the CPU (central processing unit) to the graphics card, freeing up system resources and improving overall performance. In the hierarchy of Electronics/Computers/Laptop Computers/Expansion Cards, Graphics cards fit as a specialized type of expansion card that is specifically designed for handling graphical data. These cards are equipped with their own memory (VRAM) and processing unit (GPU), which makes them capable of performing complex calculations required for rendering 3D graphics, videos and images much faster than the CPU alone. The Graphics Card can be used to improve gaming performance, video editing, CAD software or any other application that requires a lot of graphical processing power. They come in different forms, sizes, and capabilities, from low-end models designed for basic multimedia tasks to high-end models specifically built for demanding 3D rendering and gaming. In summary, Graphics cards are specialized expansion cards that enhance the visual capabilities of computer systems by offloading graphical data processing from the CPU to a dedicated GPU. They are an essential component for anyone looking to improve their computer's performance in graphically intensive tasks such as gaming or video editing.