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Thread: overclocking

  1. #11
    Join Date
    Feb 2011
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    Re: overclocking

    Quote Originally Posted by ZombieApocalypse View Post
    3401 MHz is not overclocked.
    I disagree. When "1" is reported as the last digit, it means it is in turbo mode, and does not report the actual frequency. All we know is that is is above the rated frequency. So my same example again below but also using "turbostat" which reports the actual frequency of 3.81 Ghz:
    Code:
    doug@s15:~/temp$ ./set_cpu_inquire
    ondemand
    ondemand
    ondemand
    ondemand
    ondemand
    ondemand
    ondemand
    ondemand
    cpu MHz         : 1600.000
    cpu MHz         : 1600.000
    cpu MHz         : 1600.000
    cpu MHz         : 1600.000
    cpu MHz         : 1600.000
    cpu MHz         : 3401.000   <<< CPU 5 is in turbo mode
    cpu MHz         : 1600.000
    cpu MHz         : 1600.000
    doug@s15:~/temp$ sudo ./turbostat
     cr CPU    %c0  GHz  TSC    %c1    %c3    %c6    %c7  %pc2  %pc3  %pc6  %pc7
              12.52 3.81 3.41  14.06   0.02  73.40   0.00  0.00  0.00  0.00  0.00
       0   0   0.04 3.65 3.41   0.15   0.10  99.71   0.00  0.00  0.00  0.00  0.00
       0   4   0.04 3.66 3.41   0.15   0.10  99.71   0.00  0.00  0.00  0.00  0.00
       1   1   0.01 3.78 3.41  99.99   0.00   0.00   0.00  0.00  0.00  0.00  0.00
       1   5  99.95 3.81 3.41   0.05   0.00   0.00   0.00  0.00  0.00  0.00  0.00   <<< CPU 5 is actually at 3.81 GHz.
       2   2   0.03 3.65 3.41   4.01   0.00  95.97   0.00  0.00  0.00  0.00  0.00
       2   6   0.03 3.60 3.41   4.01   0.00  95.97   0.00  0.00  0.00  0.00  0.00
       3   3   0.03 3.70 3.41   2.06   0.00  97.91   0.00  0.00  0.00  0.00  0.00
       3   7   0.02 3.59 3.41   2.07   0.00  97.91   0.00  0.00  0.00  0.00  0.00
    Edit: I found the list of available frequencies (which depends on the governore mode):
    Code:
    doug@s15:~/temp$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
    Last edited by Doug S; April 30th, 2013 at 05:22 PM. Reason: added list of available frequencies
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

  2. #12
    Join Date
    Dec 2012
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    Canada
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    Ubuntu 13.04 Raring Ringtail

    Re: overclocking

    OK I got it to max usages is there a way to it to go past the 2200.00 celling my cpu is programmed for

    isaac@isaacs-MacBookPro:~$ grep MHz /proc/cpuinfo
    cpu MHz : 2200.000
    cpu MHz : 2200.000
    loving the lemur ultra

  3. #13
    Join Date
    Jun 2007
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    11,603

    Re: overclocking

    @Doug: Turbo boost is preprogrammed into the CPU and approved by the CPU vendor. It's not really OC'ing in the traditional sense.

    Quote Originally Posted by Isaacmarritt View Post
    OK I got it to max usages is there a way to it to go past the 2200.00 celling my cpu is programmed for
    If your BIOS doesn't support it, then no.

    Do you really think Apple wants its users getting more MHz without paying for them? Do you really think Apple wants to pay to replace hardware after users burn it out with OC'ing?
    Note: ^those are rhetorical questions. What I'm getting at is that OC'ing is frowned upon in the walled garden..

  4. #14
    Join Date
    Feb 2011
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    Re: overclocking

    Quote Originally Posted by Temüjin View Post
    @Doug: Turbo boost is preprogrammed into the CPU and approved by the CPU vendor. It's not really OC'ing in the traditional sense.
    Thanks for the clarification. And yes, I do mix the two terminologies (turbo boost Verses overclocking). I would never ever overclock as you mean it.
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

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