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Graphics cards, also known as graphics processing units (GPUs) or video cards, are specialized electronic components that handle the rendering and display of graphical data on a computer. They are designed to accelerate the creation and manipulation of images and videos, taking this task away from the central processing unit (CPU) and allowing for faster and more efficient visual performance. In the context of embedded systems, graphics cards can be used to provide high-quality graphical interfaces and user experiences on devices with limited resources. They can also be used in computers to enhance the performance of demanding graphical applications such as video games, 3D modeling software, and scientific simulations. Graphics cards typically connect to the motherboard of a computer through a slot known as a PCI Express (PCIe) interface. They contain their own memory, known as video random access memory (VRAM), which is used to store graphical data for quick access by the GPU. Graphics cards may also include additional features such as cooling systems, multiple display outputs, and hardware-accelerated video decoding. Overall, graphics cards are an essential component of modern computers and embedded systems, enabling the creation and display of rich, detailed graphical content on a variety of devices. They play a crucial role in the hierarchy of electronics, computing, and embedded systems, providing the necessary processing power to handle the demands of graphically-intensive applications.