You must have disabled the CPU power management in BIOS that results in static base clock on all cores, which is 2000MHz for your CPU.So there is a bios error, that prevents CPU to shift to single core max speed at x99-TF Huanan board.
Or the turbo boost is disabled in bios.
There are some combinations of the powermanagement settings that can cause this.
I suggest resetting the bios to defaults.