According to Apple my 10-core iMac Pro should Turbo Boost to 4.5GHz when running single-thread tasks. The OS installed is Mojave.
When running a Mathematica code using only one kernel, Intel Power Gadget says that the frequency is 3.8-3.9GHz rather than 4.5GHz. The room temperature is 24ºC and the fans are going at the minimum speed. Note that a single-thread tasks is equivalent to a 5% load as their are 20 threads available thanks to Hyper-threading. See plot:
Perhaps the task I am running somehow does not demand the max Turbo Boost frequency. Could someone suggest a task/computation that could make my iMac Pro reach the advertised 4.5GHz?
Note that I am not asking what Turbo Boost is as this has been answered Here.