Why do computers need GPUs (integrated or external)? What information is the CPU sending to the GPU that it can’t just send to a display?

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Why do computers need GPUs (integrated or external)? What information is the CPU sending to the GPU that it can’t just send to a display?

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The CPU is a general-purpose computer. It’s strength lies in being able to do any kind of calculation. A GPU is a specialized computer that’s optimised for the specific task of rendering 3D graphics, and does its job much faster as a result.

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