It's been a while, but IIRC the integrated GPUs are only L3-cache coherent. So while that greatly improves the memcpy problem, anything that would have fit in L

It's been a while, but IIRC the integrated GPUs are only L3-cache coherent. So while that greatly improves the memcpy problem, anything that would have fit in L1 and does a bunch of math may still be a better fit for AVX2 or AVX-512.