is there any chance to set CPU speed in BIOS to lowest possible value to save e.g. power consumption in log term op. 24/7?
As an alternative are there some utilities controlling CPU clock?
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The Intel frequency scaling driver already take care of that, so if your applications do not require high performance the cpu will always run at its lowest clock.
The intel_pstate driver supports only the performance and powersave governors and by default is set to powersave.