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For this type of information you would need to access product datasheet available on ark.intel.com
I just went through all the docs linked via that site, but I could not find the frequency table.
What we're looking for is a table similar to this one for the i7 : Intel® Core i7 Desktop Processor — Intel® Turbo Boost Technology Frequency Table
This table is not available for Xeon processors.
I have found some documentation that might help on this matter.
Also, the following third party link : Detailed Specifications of the Intel Xeon E5-2600v3 "Haswell-EP" Processors | Microway
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