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cfgauss
l33t
Joined: 18 May 2005
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Location: USA
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 Posted: Sat Nov 01, 2008 3:26 am Post subject: [SOLVED] Random beeps from CPU temperature |
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I built a new box with an Intel Core 2 Quad (with a humungous Roseweill heat sink/fan) on an Abit IP35 Pro mobo. Recently I've been getting random beeps from the PC speaker, sometimes an hour and sometimes a few hours apart. I thought that this might be the CPU overheating but the beeps occurred even when the processor was idling (virtually 0.00 load). I checked in the BIOS and it was beep-enabled for a CPU temp of 75C (shutdown at 95C) and a CPU fan speed of 200 RPM. By enabling only one at a time I discovered it's the CPU temperature beep. (When neither CPU nor fan is beep-enabled there are no sounds.)
But the BIOS registers a steady 55C for the CPU. (Of course, the CPU is idling before boot.) When I do boot, the lm_sensors w83627dhg chip registers an idle temp of about 38C and the four coretemp chips show slightly lower values (about 36C on average). Even when I'm emerging the lm_sensors temp only goes up 10C at most.
Why does the BIOS give a different temp than lm_sensors? Which can I trust? Should I be worried enough to reinstall the Rosewill HSF?
Thanks for any hardware wisdom you can impart.
[SOLVED] See desultory's post below. [/SOLVED]
Last edited by cfgauss on Sat Nov 01, 2008 5:28 pm; edited 1 time in total |
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desultory
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Joined: 04 Nov 2005
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| Posted: Sat Nov 01, 2008 4:55 am Post subject: |
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| cfgauss wrote: | | Why does the BIOS give a different temp than lm_sensors? |
Could be due to using different sensors or different load or the system may not have reached its normal operating temperatures or it could be a calibration problem.
| cfgauss wrote: | | Which can I trust? |
Good question, got a hair dryer?
| cfgauss wrote: | | Should I be worried enough to reinstall the Rosewill HSF? |
Maybe, at this point probably not. |
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cfgauss
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| Posted: Sat Nov 01, 2008 5:27 pm Post subject: |
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| desultory wrote: | | Could be due to using different sensors or different load or the system may not have reached its normal operating temperatures or it could be a calibration problem. |
I think you're right that the BIOS is using different sensors. Evidently whatever sensor it's using shows 75C (hence the beep) and will shut down the CPU at 95C. I'm hoping that the BIOS sensor is mis-calibrated and that lm_sensor's chips are correct. In any case, even during an emerge in which the four cores are at 100% the CPU has never shut down.
| desultory wrote: | | Good question, got a hair dryer? |
I don't understand.
| desultory wrote: | | Maybe, at this point probably not. |
Agreed. I'll live with my solution of turning off beep-enable for the CPU temp.
Thanks for your hardware advice. |
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bunder
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Joined: 10 Apr 2004
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| Posted: Sat Nov 01, 2008 9:04 pm Post subject: |
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it might be picking up the fan speed dropping below the threshold for the sensors. i've never liked low-RPM fans for this reason. is there a way to force your fan to run at a higher speed? (ie: bios settings)
cheers
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cfgauss
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| Posted: Sun Nov 02, 2008 1:53 am Post subject: |
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| bunder wrote: | | it might be picking up the fan speed dropping below the threshold for the sensors. i've never liked low-RPM fans for this reason. is there a way to force your fan to run at a higher speed? (ie: bios settings) |
When I beep-enable the CPU fan and not the CPU temp there are no beeps. When I beep-enable the CPU temp and not the CPU fan there are beeps so it appears to be the CPU temp rather than fan which is complaining. |
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