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I am trying to overclock my new Sandy Bridge System.
uname : 2.6.37-ARCH #1 SMP x86_64 Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
mboard : ASUS P8 P67 EVO
In the uefi-bios if one chooses the performance-profile the system should automatically run with appr. 4.5 GHz in turbo-mode after save/reboot.
Stress-testing my system (kernel-compilation, multiple WinXP-vms) all cores show the regular frequency of 3.4 GHz:
cat /proc/cpuinfo =>
cpu MHz : 3435.835 (for all 8 threads)
Are there any tools that correctly monitor cpu-frequency?
What's weird is that my VirtualBox WinXP-images running cpu-z also show the base frequency even under 100% cpu-load, so no turbo-boost here.
Manually overclocking in the bios yields the same lame results.
Any hints are welcome.
Last edited by getagrip (2011-02-10 17:16:58)
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You can check with cpufreq-info or conky if it runs turbo mode. when it's showing 3401Mhz state it's running the core in turbo mode. mine is set to ~4,3GHz. but so far it's afaik not possible to read the true TC speed with any tool.
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"when it's showing 3401Mhz state it's running the core in turbo mode"
You mean it's running in turbo mode? But 3401Mhz is the base frequency, ain't it?
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cpufreq-info gives here:
available frequency steps: 3.40 GHz, 3.40 GHz, 3.30 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.90 GHz, 2.80 GHz, 2.70 GHz, 2.60 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.20 GHz, 2.10 GHz, 1.60 GHz
Note the two 3,40 GHz values. The first one is turbo mode (3401MHz) and the second one is the base freq. 3400MHz.
https://bbs.archlinux.org/viewtopic.php?id=86343 - cat /proc/cpuinfo | grep -i MHz will show you the full MHz values. Whenever you see 3401MHz the core runs in TruboMode, the kernel cannot detect the real frequency. Non-OC it should be max 3800MHz. I've setup conky to show all cores+frequencies. In the BIOS I've chosen the 2nd option for turbo mode "per core" (cannot be controlled by OS).
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@AndyRTR - the OP said he/she got the same results with manual overclocking. So the kernel cannot detect that either?
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The multiplier never exceeds 34x while monitoring with i7z-svn.
Compiling thunderbird-branded from aur I get the following output:
TURBO ENABLED on 4 Cores, Hyper Threading ON
True Frequency 3605.00 MHz (103.00 x [35])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 45x/45x/45x/45x
Current Frequency 3500.02 MHz (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 % Temp
Core 1 [0]: 3498.86 (33.97x) 11.8 34.2 7.05 47 29
Core 2 [1]: 3500.02 (33.98x) 7.04 35.7 14.4 42.9 35
Core 3 [2]: 3498.00 (33.96x) 2.48 32.3 2.5 62.7 27
Core 4 [3]: 3496.64 (33.95x) 2 36.7 1.5 59.8 32
That's it, it never goes over 34.00x. What could be the reason for this?
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Ive updated to the latest official bios and use the AUTO OC. Works well here. Conky shows 3401MHz under load and compile time is a lot faster than before oc'ing it.
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OK, I have just updated to the latest bios.
Manually overclocking still does not work:
True Frequency 3498.97 MHz (99.97 x [35])
How does AUTO OC work?
I tried loading optimal-default-settings with F5 and then clicked the right-most image (the orange/red color clock) to load the performance-profile.
Would that be enough to get AUTO OC working?
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Maybe i7z is just not capable of showing multipliers above the standard base-multiplier?
Does "Actual Freq (Mult.)" output ever exceed 34x while you are running i7z?
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