Underclocking 2018-01-20 Program you're gonna need: cpupower. It's in the official repository. More info: https://wiki.archlinux.org/index.php/CPU_frequency_scaling#cpupower You can probably figure out the rest on your own... Have a look at: /etc/default/cpupower $ cpupower frequency-info $ cpupower frequency-set -g powersave $ cpupower frequency-set -u 3.1GHz $ cpupower frequency-set -u 2.8GHz