Intel E5 v3 processors shift the cpu frequency from the normal frequency range to a lower, "AVX" frequency range when executing AVX instructions. Documentation for this can be found here: http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-e5-v3-spec-update.pdf
Do other Intel processors also have an AVX base frequency that is lower than the normal processor base frequency? Specifically, do any of the i7 processors?
Here is an overview of the AVX frequencies that is a bit easier to understand: http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/performance-xeon-e5-v3-advanced-vector-extensio…
Also an Anandtech article on the Xeon E5 that explain AVX base and turbo frequencies: Power Optimizations - Intel Xeon E5 Version 3: Up to 18 Haswell EP Cores
So there is extensive information about this feature for Xeon E5 processors v3, but I have not seen mention of it for any other processors that support AVX instructions.