Scalar output would be way less than that number, 25 GFLOPS. At most 2x clock frequency. It's likely their benchmark just doesn't support AVX2 (and FMA [1]). Y

Scalar output would be way less than that number, 25 GFLOPS. At most 2x clock frequency. It's likely their benchmark just doesn't support AVX2 (and FMA [1]). You get about 25 GFLOPS if you use SSE only. [1]: https://en.wikipedia.org/wiki/FMA_instruction_set https://en.wikipedia.org/wiki/FMA_instruction_set