Phenom II X4 955 BE fan randomly speeding up

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marco_89

marco_89

Distinguished
May 20, 2011
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18,530
Firstly, let me say that Cool n' Quiet is off.

Okay, so my CPU fan randomly goes berzerk and decides to blow at 100% ever so often for no reason. I'm monitoring the temps with PC Meter.

The temperature is not even close to the hysteresis point, as the fan ramps up at any random temperature, whether it is at idle temps(45 degrees celcius) while I am doing absolutely nothing...or while closer to 55 when I'm doing stuff. It doesn't matter what's being done/what temperature it is, it just randomly spikes to 100% fan speed.

It's set to stock speeds, no overclocking of anything.

Anyone has any ideas of what could be causing it?

Some more information:

Setup:
GPU: XFX HD 7870 Double D
Mobo: ASRock 870Xtreme
RAM: 2 x 2GB G.skill ddr3 1600mhz
PSU: corsair tx650w
 
Solution
M
If you have your fan plugged into the motherboard header for the CPU fan then it's controlled by the motherboard. Often you will see options in the BIOS to control fan speed by temperature. You should be able to go into the BIOS and place it at a set speed or percentage of maximum speed. ASRock OC Tuner can probably control these fan speeds so make sure it doesn't have any presets in place that could be controlling your fan speed.
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marco_89

marco_89

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May 20, 2011
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18,530


Absolutely sure it's the CPU, as i'm monitoring CPU and Chassis fan speeds using ASRock OC Tuner, and GPU fan speeds with MSI Afterburner.

I never thought about the BIOS, but it was fine all along. I'll look into it though.


Any other thoughts?
 
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M

megamanx00

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Sep 3, 2008
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If you have your fan plugged into the motherboard header for the CPU fan then it's controlled by the motherboard. Often you will see options in the BIOS to control fan speed by temperature. You should be able to go into the BIOS and place it at a set speed or percentage of maximum speed. ASRock OC Tuner can probably control these fan speeds so make sure it doesn't have any presets in place that could be controlling your fan speed.
 
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