How to enable CPU Turbo-Boost in Ubuntu?

Question

I'm having server with 9700K and want to enable turbo-boost to get 4.9 GHz.

I've installed cpufrequtils and set performance mode.

Via 'cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' I'm getting 3.6 GHz.

Using Ubuntu 18.04.3 LTS.

Answer 1

cat /sys/devices/system/cpu/intel_pstate/no_turbo

needs to show a 0. To make it 0 do ...

sudo -i
echo "0" | tee /sys/devices/system/cpu/intel_pstate/no_turbo
exit

• Assuming you have an Intel as it is called Intel Turbo Boost
• If you get a "Operation not permitted" it means you have turbo disabled in BIOS (source https://askubuntu.com/a/876998/15811 ) (and intel pstate source and the text explaining it).