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I have a 4-pin fan from a stock AMD cooler plugged into the 4-pin CPU_FAN header on an Asus Crosshair III Formula. I've enabled Q-Fan function in the BIOS and installed AI Suite to be able to control things from Windows. So here's the problem - whatever I do, my CPU fan is running at a constant speed. I think the problem originates from the temperature sensor AI Suite uses. Right now it's reading 44C CPU temp, but it's actually running at 33C (confirmed by AOD, Core Temp and HWInfo).

 

How do I fix this? I don't want to run the fan at 100% all the time and if I don't, my CPU would fry whenever a more intensive program/game is running. Thanks!

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you dont have anything to worry about when it comes to frying your cpu. 
If it gets too hot, it will shut down.

As for the fan thing, its too early in the morning for me, sorry. 
Someone else should be able to help you very soon.

 

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Get speedfan, go into the config button on the top.

Go to advanced

Choose  IT8728F at $290 on ISA

Where it says

PWM 1 mode, change it to software controlled

PWM 2 mode, Do the same

PWM 3 Set it to ON/OFF

If you want it to stay, click remember it and click okay

If you want to change fan speeds click the up arrow on the top right Pwm.

www.almico.com/speedfan.php

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