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skylake "k" overclocking doesn't work under linux?

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  • skylake "k" overclocking doesn't work under linux?

    anyone running a "k" skylake processor notice turbo boost, nor multiplier overclocking, work at all under linux?

    my motherboard is a asus maximus viii hero (bios 1202) and i noticed that my 6700k with either 4.2 or 4.3 kernel refuses to overclock. if i turn off c-states, manually set voltage, and set my multiplier to something as little as 42, no matter what, linux only reports 4ghz speed.

    when i have governor set to ondemand it scales between 800mhz and 4ghz. even if multiplier is set to 42.

    i've also tried setting cpu governor to performance and even went as far and disabled cpu frequency scaling support (intel_pstate) in the kernel.
    even turbo doesn't work if i set everything to default. it never goes above 4ghz under linux. i use cat /proc/cpuinfo and that i7z git program to monitor cpu frequency.

    overclocking only works on windows, which currently i'm running windows 10 atm. switched back after the whole nvidia segfaults and steam crashing fiasco. i have c-states off, turbo on, multiplier set to a fixed 42 sync all cores, manual voltage of 1.23v's, and windows power management set to performance.

  • #2
    Had this same problem with the same board and cpu. I got it fixed though by updating the Kernel. Steps taken (in CentOS 7)...

    Disable SecureBoot in BIOS.
    su root
    rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
    rpm -Uvh http://www.elrepo.org/elrepo-release...epo.noarch.rpm
    yum --enablerepo=elrepo-kernel install kernel-ml
    Install, Reboot and pick the new kernel and test.


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