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Surging CPU Fan

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#1 alan1884


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Posted 25 February 2015 - 12:12 PM

I have a Dell Studio XPS 8100 running Windows 7 that is about 5 years old.

The CPU is a Core i7 CPU 879 @ 2.93 GHz.


Recently the CPU fan started surging to a high speed. After start-up, it can take up to a couple of hours for this surging to take place.


Here is what I have tried so far:

1. Ran Dell's hardware diagnostics with no problems shown.

2. Opened the computer and checked for dust problems. Minimal dust present. I cleaned what was there. I also removed the CPU cooler-fan and re-seated with new thermal compound.

3. I checked the BIOS.  It has the latest update.

4. I recently started in Safe Mode and noted that there was no longer any CPU fan surging present after a couple days of operation. After restarting normally, the fan surging showed up again after about one hour.


Any ideas about fixing this problem would be greatly appreciated. Should I try re-flashing the bios? I do have a new CPU cooler-fan. Is it worth replacing the old unit.



Thanks for Your Help





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#2 YeahBleeping


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Posted 25 February 2015 - 04:58 PM

If I remember coorectly dell's computers have an onboard temperature sensor that will automatically ramp up the cooling based on how much work is being placed on the cpu.  I believe this to be normal operation.. If temps are fine and you reseated the cooler after re-applying thermal paste then I am not sure you have a problem unless your cooler isn't 'seated' properly.

#3 GameMaster


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Posted 25 February 2015 - 07:51 PM

Something may be demanding a lot from your CPU. You may be able to check what it is using task manager (if you are on Windows).

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