The kernel support can be enabled/disabled using the /sys/devices/system/cpu/cpufreq/boost file. You can disable the Turbo Boost using the BIOS or some Linux options/commands. Turbo Boost has nothing to do with fans or forced induction but is Intel’s marketing name for the technology that allows a processor to increase its core clock speed dynamically whenever the need arises. Here, the CPU will be at the nominal/minimal value (1.20Ghz) all the time. Note the difference when you run the same command with Turbo Boost disabled: In the boost state support section, the values for Supported and Active are no. You may find the technical information of these frequencies at the Intel website. Note that the information states the hardware limits ( 1.20 GHz - 3.47 GHz), the possible frequencies ( 3.47 GHz, 3.33 GHz, 2.53 GHz, 1.87 GHz, 1.20 GHz) and the current frequency ( 1.87 GHz). $ cpupower frequency-infoĬPUs which run at the same hardware frequency: 0ĬPUs which need to have their frequency coordinated by software: 0Īvailable frequency steps: 3.47 GHz, 3.33 GHz, 2.53 GHz, 1.87 GHz, 1.20 GHzĪvailable cpufreq governors: conservative, ondemand, userspace, powersave, performanceĬurrent policy: frequency should be within 1.20 GHz and 3.47 GHz.
For instance, for an old Intel Core i5-660 with Turbo Boost enabled, you will get the following. To determine if the Turbo Boost is activated and which is the current frequency, you can use cpupower frequency-info. If Turbo Boost is enabled and all the cores are working, the CPU will work at 2.10GHz.When Turbo Boost is enabled and only one of the cores is working, the CPU will work at a maximum of 3.30GHz.If you disable the Turbo Boost (in the BIOS setup menu), the CPU will work at 2.10GHz all the time.It has a base frequency of 2.10GHz and a Max Turbo Frequency of 3.30GHz. The Intel Core i7-4600U Processor supports Turbo Boost technology.
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