AdiSoldier245 t1_j6lp924 wrote
Reply to comment by WeirdGamerAidan in ELI5: 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? by WeirdGamerAidan
An integrated GPU is a seperate GPU inside the processor, it's not using the CPU to compute graphics. If you look at internal layouts of a processor with an iGPU, you'll see the GPU as a seperate object. So displaying doesn't slow down the CPU part of the CPU(that much, there could be bandwith issues).
A discrete GPU is what goes into a pcie slot and is a GPU outside of the processor. This is what most games require as the iGPU is mostly only enough for displaying and maybe processing video.
Software rendering is using the CPU cores themselves to do graphics tasks.
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