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Old 04-24-2011, 01:24 PM   #1
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Default CPU Fan Problem

I just noticed this today, and I've never seen it do this: My fan (I'm pretty sure it's my CPU fan otherwise it's my PSU's) keeps going up and down in speed when it needs to go faster, instead of going up at a gradual and smooth increase. I really don't know whats wrong, but if I had to take a guess I'd say it's either the fan controller chip (if there is such a thing ) or the fan itself. Please help, because I don't want it to break while I'm gone and have my CPU over heat.

Like if you pictured a flow chart, instead of it going smoothly up to its desired speed, It goes a little up and down and up and down until it reaches its desired speed. I hope this helped.
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Old 04-25-2011, 03:20 PM   #2
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Default Re: CPU Fan Problem

I also noticed that when the fan's at a constant speed, it will sort of sound like a car revving its engine when acts weird.
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Old 04-25-2011, 03:34 PM   #3
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Default Re: CPU Fan Problem

probably just the bearings in the fan dying. Fans always go up and down in speed since most boards have automatic controllers for fans dependant on load and heat production.
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Old 04-26-2011, 05:03 PM   #4
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Default Re: CPU Fan Problem

has this only started to happen recently?? Was the fan ok before?? How old is your system? Is your CPU overheating?? The fan might be speeding up to cool the CPU, you could try to install a CPU monitor to see what the tempreature is like when the fan comes on
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