It will take some time until that question can be answered. For some it will likely matter a lot, e.g. engineering or HPC applications that rely heavily on dense solvers. however, even for non FP-heavy workloads (like integer-heavy stuff say databases) the wider SIMD with the new mask and blend instructions [1] _could_ make a significant difference. Still, in many cases significant difference will likely be seen only after careful tuning!

Also note that Intel is refining their pesky market segmentation game: the full 2x 512-bit FMA/cycle is only available on high-end CPUs, only lower-end it's only 1 FMA/cycle and you still get the extra AVX512 clock throttle hit [2]!

I really like the fact that AMD stayed away from such devil-in-the-details feature-based market segmentation!

[1] https://software.intel.com/en-us/blogs/2013/avx-512-instruct... [2] https://www.servethehome.com/wp-content/uploads/2017/07/Inte...