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Rodeffs

Member

Registered: 2023-09-02

Posts: 10

[SOLVED] Unable to turn off boost on AMD processor

I've found out that my AMD Ryzen 7 5800H processor tends to overheat up to 95°C while only under 30% load. I've come to conclusion that it has to do with processor boosting being enabled as the output of cpupower suggests:

analyzing CPU 0:
  driver: amd-pstate-epp
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency:  Cannot determine or is not supported.
  hardware limits: 400 MHz - 4.46 GHz
  available cpufreq governors: performance powersave
  current policy: frequency should be within 400 MHz and 4.46 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.40 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes
    AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.46 GHz.
    AMD PSTATE Nominal Performance: 119. Nominal Frequency: 3.20 GHz.
    AMD PSTATE Lowest Non-linear Performance: 41. Lowest Non-linear Frequency: 1.10 GHz.
    AMD PSTATE Lowest Performance: 15. Lowest Frequency: 400 MHz.

Apparently, it should be possible turn the boost off by entering:

echo 0 > /sys/devices/system/cpu/cpufreq/boost

However, I get the following error:

bash: /sys/devices/system/cpu/cpufreq/boost: Permission denied

even when I'm logged on as root. Not only that, but the boost file itself is not present at all in the /sys/devices/system/cpu/cpufreq folder, which AFAIK should be there since my processor does support boosting as stated above.

Last edited by Rodeffs (2024-01-02 08:45:58)

Rodeffs

Member

Registered: 2023-09-02

Posts: 10

Re: [SOLVED] Unable to turn off boost on AMD processor

Managed to solve it on my own