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Thread: CPU not running at full speed in Ubuntu

  1. #1
    HEXUS webmaster Steve's Avatar
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    CPU not running at full speed in Ubuntu

    Got a QX6700, CPU-Z reports 2.66GHz in Windows, but under Ubuntu Hardy, /proc/cpuinfo reports this:
    Code:
    processor	: 0
    vendor_id	: GenuineIntel
    cpu family	: 6
    model		: 15
    model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
    stepping	: 7
    cpu MHz		: 1602.000
    cache size	: 4096 KB
    physical id	: 0
    siblings	: 4
    core id		: 0
    cpu cores	: 4
    fpu		: yes
    fpu_exception	: yes
    cpuid level	: 10
    wp		: yes
    flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
    bogomips	: 5349.46
    clflush size	: 64
    cache_alignment	: 64
    address sizes	: 36 bits physical, 48 bits virtual
    power management:
    
    processor	: 1
    vendor_id	: GenuineIntel
    cpu family	: 6
    model		: 15
    model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
    stepping	: 7
    cpu MHz		: 1602.000
    cache size	: 4096 KB
    physical id	: 0
    siblings	: 4
    core id		: 3
    cpu cores	: 4
    fpu		: yes
    fpu_exception	: yes
    cpuid level	: 10
    wp		: yes
    flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
    bogomips	: 5345.47
    clflush size	: 64
    cache_alignment	: 64
    address sizes	: 36 bits physical, 48 bits virtual
    power management:
    
    processor	: 2
    vendor_id	: GenuineIntel
    cpu family	: 6
    model		: 15
    model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
    stepping	: 7
    cpu MHz		: 1602.000
    cache size	: 4096 KB
    physical id	: 0
    siblings	: 4
    core id		: 1
    cpu cores	: 4
    fpu		: yes
    fpu_exception	: yes
    cpuid level	: 10
    wp		: yes
    flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
    bogomips	: 5345.49
    clflush size	: 64
    cache_alignment	: 64
    address sizes	: 36 bits physical, 48 bits virtual
    power management:
    
    processor	: 3
    vendor_id	: GenuineIntel
    cpu family	: 6
    model		: 15
    model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
    stepping	: 7
    cpu MHz		: 1602.000
    cache size	: 4096 KB
    physical id	: 0
    siblings	: 4
    core id		: 2
    cpu cores	: 4
    fpu		: yes
    fpu_exception	: yes
    cpuid level	: 10
    wp		: yes
    flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
    bogomips	: 5345.44
    clflush size	: 64
    cache_alignment	: 64
    address sizes	: 36 bits physical, 48 bits virtual
    power management:
    Any ideas what's up there? EIST and C1E are off.

    CPU is sat in an Abit IX38 QuadGT with the latest BIOS.
    PHP Code:
    $s = new signature();
    $s->sarcasm()->intellect()->font('Courier New')->display(); 

  2. #2
    HEXUS webmaster Steve's Avatar
    Join Date
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    Location
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    • Steve's system
      • CPU:
      • Intel i3-350M 2.27GHz
      • Memory:
      • 8GiB Crucial DDR3
      • Storage:
      • 320GB HDD
      • Graphics card(s):
      • Intel HD3000
      • Operating System:
      • Ubuntu 11.10

    Re: CPU not running at full speed in Ubuntu

    Fixed it.

    Turned C1E/EIST back on because it wasn't those causing it. It was gnome's settings for cpufreq scaling.

    run gconf-editor

    Then expand apps->gnome-power-manager->cpufreq

    I kept the profiles set to "ondemand" (so it'll scale up CPU clock as needed) ticked the "consider nice" box so that it wouldn't ignore folding, which runs niced.

    Folding at full speed now.
    PHP Code:
    $s = new signature();
    $s->sarcasm()->intellect()->font('Courier New')->display(); 

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