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The basic architecture of CPU and GPU are different. Modern CPU's consist of a set of cores. Each core has its own a set of registers, a ALU and a control unit with some private cache. In a CPU the number of ALU's (the actual processor) is in 1-100 range. In a GPU number of ALU's are in thousands. The register files are larger and is shared among multiple ...


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GPUs are highly specialized: they are very good at a very small number of things, but they are extremely bad at everything else. CPUs are general: they are mediocre at everything. GPUs are good at applying the same operation out of a small number of potential operations, and in particular, the same very simple operation to a lot of identical things. E.g. ...


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