I bought a Haswell Xeon (e5 1630) just this week for a new workstation build, because it was the only Xeon with high ghz that was available at a reasonable pric

I bought a Haswell Xeon (e5 1630) just this week for a new workstation build, because it was the only Xeon with high ghz that was available at a reasonable price (ie comparable to i7). E.g. the e3 1280 is a skylake xeon but 'only' supports avx2. Maybe the e7 skylake ones have avx512? I didn't look into those as they were out of my budget anyway :)