RE: I5 6400 turbo boost
Appears at least this Dell has it on by default with the on/off option removed from the bios. Below is from the Intel processor diagnostic tool. I will point out I did get gypped out of .00012 GHz - lol
CPU Frequency Test
Module Version: 220.127.116.11b.W
Start Time: Thu Dec 29 09:08:42 2016
Test Result - PASS
Processor Name: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
Expected CPU Frequency: 2.70
Detected CPU Frequency: 3.29988
Expected Base Clock: 100
Detected Base Clock: 99.9962
Expected frequency - The highest frequency at which the tested processor was manufactured to operate
Detected frequency - The frequency at which the tested processor is currently operating
Power management modes can create marginally higher or lower detected frequency
than expected frequency. Small variations in clock frequencies are common.
QPI link rate Test - Not supported.
Skipping QPI link rate Test.
End Time: Thu Dec 29 09:08:43 2016
Total Time: seconds: 1