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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In a computer with a GPU, the CPU is sending instructions and memory addresses to the GPU. It does things like, here are the points of a triangle, go to this location and use that picture for the triangle. After sending a punch of triangles and image locations the CPU can go back to doing things like applying gravity and camera movement. The GPU loads in the pictures it doesn’t already have and takes all those triangles and turns them into a picture on your screen. The GPU was made to do this step very well. It handles hundreds of triangles at the same time. CPUs are designed to handle math where there are lots of steps that depend on each other. GPUs are designed to handle doing the same step to lots of times to thing that are mostly independent.
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