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I know for Skylake X you need a 61xx or better CPU to get two FMAs, but it’s not clear what the situation is with Skylake W ? Everything I have found for Skylake W just says “up to two FMAs”, without any specific detail as to which CPUs have 1 and which have 2?

  • dumb question but what is FMA? – jmh Dec 19 '17 at 20:43
  • Sorry - floating point multiply-accumulate - useful for heavy duty number crunching - cheaper Skylake CPUs have 1, more expensive versions have 2. – Paul R Dec 19 '17 at 20:45
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Only a few low-end 4 core Skylake W CPUs are limited to one FMA. Even the entry-level iMac Pro has an 8 core CPU, so it would appear that all iMac Pro configurations will have two FMAs.

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