There are certain situations where I disable Intel Turbo Boost, for example to keep fans quiet during the night time.
Ensure that P-State driver is works in active (governor) or passive (cpufreq) mode.
$ cat /sys/devices/system/cpu/intel_pstate/status
Inspect current Intel Turbo Boost status.
0 states that it is not disabled,
1 that it disabled.
$ cat /sys/devices/system/cpu/intel_pstate/no_turbo
Disable Intel Turbo Boost.
$ echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo