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How much faster is GPU compare to CPU

Hi, I heard the amazing things about GPU and how much faster it can beat CPU. But I don’t know what kind of speed up is expected. So I ran a matrix multiplication to do the comparison. I ran my experiment on a server that has a Intel Gold 6148 CPU, which has 20 cores at 2.40 GHz frequency, and a GPU of NVIDIA V100 16GB memory. For CPU I used OpenBLAS library, and CuBLAS for the GPU. I think both libraries are highly optimized and should be a fair comparison. The OpenBLAS thread count default on...