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What can a cpu core do that a gpu core can't do? (alien.top)

submitted 9 months ago by [email protected] to c/[email protected]

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Afaik, gpu cores a very stripped down cpu cores that do basic math, but what sort of math can cpus do that gpus can't

I'm talking, cpu core vs Tensor/Cuda cores.

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[–] [email protected] 1 points 9 months ago (4 children)

I mean if you're creative enough, probably nothing.

This is kinda like asking what can I do on a lathe that I can't do on a mill. It's more what's better suited to be done on one or the other.

CPUs are more generalised; they have a deep and complex instruction set and feature list. While GPUs are shallower and far more specialised, but do tasks that parallellalise more readily... Like calculating a metric shitload of triangles.

You can see CPUs used to 'push pixels' in older computers since that's all they had.

[–] [email protected] 1 points 9 months ago (3 children)

Follow up question, what allowed CPUs before the advent of eGPU/dGPU's to output video, or what prevents them from doing so now?

[–] [email protected] 1 points 9 months ago

Video cards that didn't have a GPU, but instead were just a RAMDAC or "scan out" engine.

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