How can I underclock CPU? (rooted)

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小羅奶黃包

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May 10, 2016, 6:38:23 AM5/10/16
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After long time to use remix OS, my miix 700 is too high temperature (80 degree up).
How can I underclock without apps such like modify system.prop or init.sh file?

Rooted by supersu.

Augusto Ícaro Farias da Cunha

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May 10, 2016, 9:30:01 AM5/10/16
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By default this option isn't available in system interface, but you can modify the init.sh file like in tutorial bellow:


I recommend do the cat command in file that store the available cpu freqs to avoid make a mistake.

Other tweaks tutorials:


A great explanation about the configs and point the myths( Old, but explain some common coomands ):

You also can try this useful app:

小羅奶黃包

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May 10, 2016, 10:03:17 AM5/10/16
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My device is miix 700 with CPU m7-6y75 freq (400-3100 MHz).
There are cpu0 to cpu3 in /sys/devices/system/cpu/.

I add four instruction in init.sh before "return 0" as following:

-------
echo "1600000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo "1600000" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq
echo "1600000" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq
echo "1600000" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq
-------

reboot and success. Thank you.

Augusto Ícaro Farias da Cunha

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May 10, 2016, 10:37:20 AM5/10/16
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Exactly this! Did you see if this freq is available cpufreq?

nelso...@gmail.com

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May 10, 2016, 11:01:08 AM5/10/16
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Did it solved your temperature issue?
Because the CPU activity may be coming from something else...

小羅奶黃包

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May 10, 2016, 11:28:31 AM5/10/16
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I downloaded CPU-Z and AIDA64 to see cpu and temperatue status.
After I modify max_freq from 3.10GHz to 1.60GHz, the temperature was from 80 degree to 60 degree. (10 more mins to use)
The default CPU Scaling Governor is powersave but I think it is not usual.
Maybe Miix 700 with Core-M is fanless device. It is different to other PC or NB.

hypot...@gmail.com

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May 10, 2016, 11:49:12 AM5/10/16
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What I've been doing is turning of turbo-boost on my core M. This keeps my cpu at 800MHz; yours would be 1.2GHz. It's the same way to disable on linux:
"echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo"
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