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Computer fan stops/slows when XP starts

I have an HP desktop with an Intel 845G chipset.  Been working fine, but now I notice that as soon as XP starts the fan gets extremely slow and never speeds back up.  I have tried this fan in other computers and other fans in this computer but get the same result.  Also tried another power supply to no avail.

I believe it is something in the hardware fan control software that XP is using, but do not know how to look at that.  Any suggestions?
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ifcrobert
Asked:
ifcrobert
1 Solution
 
CallandorCommented:
If it's a Northbridge chipset fan, I found mine to be too noisy and unplugged it.  I installed a quiet 80mm Panaflo case fan and pointed it at the heatsink and that works better for me.
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weblinktechnologiesCommented:

Try adding another Fan to your PC.  Your Fan probably senses that your CPU is getting abnormally hot and spends up.  By adding another fan it should help cool your system more effectively.   Or, do something else that keeps your PC running as cool as possible
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sacpCommented:
Try some software that asks for a lot of CPU and at the same time another program to watch its temperature. This way, you can see if the fan speeds back when need. Some computers control the fan speed as it is needed so it becomes more quiet.

To heat the CPU you could try CPU Burn-in and Motherboard Monitor to monitor the temperature or the monitoring software that might come with your Mobo.

Run the burn-in software so it really heats the CPU but pay attention to its temperature. if it's too hot just quit the program.
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