Description:

A small daemon to adjust cpu speed and voltage (and not only) for
kernels using any of the cpufreq drivers available. Cpufreqd is not a
userspace governor.
Cpufreqd allows you to apply governor profiles from rules based on
battery level, ac status, temperature (ACPI or sensors), running
programs, cpu usage and (maybe) more. You can also change your nforce
FSB clock and video card frequency (NVidia only) or execute arbitrary
commands when a specific rule is applied.
You need a CPU with frequency and voltage scaling capabilities and a
Linux kernel with cpufreq support.