Why can’t we just pack more and more ALUs in a CPU to increase processing throughput instead of increasing clockspeeds? Wouldn’t the gain be just as significant?
In: Engineering
It’s a balance between area/power requirements and actual boost in performance.
And in a way that’s what a GPU is except they call them SIMD units not ALUs but it’s the same idea.
The difference between a CPU and a GPU though is what they are meant to run. A CPU is meant to execute programs that are largely serial in nature (e.g. compile a program, etc…) whereas a GPU is meant to execute programs that are highly parallel like compute shader expressions over millions of pixels.
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