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Windows 7: Fan racket at restart

29 Aug 2010   #1
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 
Fan racket at restart

My fan (in a Dell Inspiron 530 desktop) has this habit that it is revving at the highest speed after a Restart. It does not do that at cold start nor at wakeup from sleep.
The way I get it back to normal is to go into sleep mode after the OS is loaded and wake it back up. Then things go back to normal.
Does anybody have an idea how to fix that?


My System SpecsSystem Spec
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29 Aug 2010   #2
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

More clues would help, as I'm sure you've already worked on.

I would use the Task Manager and perhaps CPU-Z to monitor the computer's behavior. First, note the CPU and memory usage, temps, and hard drive activity at "normal", then compare to the same when restarting. Maybe that will give some indication of what direction to start looking.
My System SpecsSystem Spec
29 Aug 2010   #3
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Thanks for the answer. But there is really nothing unusual to report. My temps are normal and a shutdown/reboot runs normal whilst a restart a minute later will produce the high revving. And it happens at all times - even if the computer was just running for a couple of minutes.
My System SpecsSystem Spec
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29 Aug 2010   #4
boohbah

Microsoft Windows 7 Home Premium 64-bit 7600
 
 

could it be the fan shaft needs lubricating as they can clog over time .and set the shaft out if line . causing a racket , after they have been on for a time the clog can shift a bit from being heated thus re lubricating the shaft and realigning it. just a thought! Ive been Googling .
My System SpecsSystem Spec
29 Aug 2010   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by boohbah View Post
could it be the fan shaft needs lubricating as they can clog over time .and set the shaft out if line . causing a racket , after they have been on for a time the clog can shift a bit from being heated thus re lubricating the shaft and realigning it. just a thought! Ive been Googling .
I do not think so. The racket is just from the fan revving at top speed. It is not an unusual noise with crackling or so - just the high fan speed. Else (other than at restart) the fan is very quiet.
My System SpecsSystem Spec
29 Aug 2010   #6
Fumz

7 Ultimate x64
 
 

I don't really see a problem? When you cold boot your cpu is... well... cold. When rebooting your cpu is already warm. As you've said, you don't have any temp issues, so when the machine figures this out fan speed (and noise) goes back to normal.
My System SpecsSystem Spec
29 Aug 2010   #7
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
when the machine figures this out fan speed (and noise) goes back to normal.
Well, that is part of the problem - it does not go back to normal (and I once let it run for 30 minutes). Only when I put the system to sleep and then immediately wake it up again, it goes to normal.
My System SpecsSystem Spec
29 Aug 2010   #8
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Well usually if there is a variable speed function for the fans, that is the duty of the motherboard - it reads it's own temps and adjusts the speeds accordingly.

Normally I would suggest going into the BIOS and checking the settings for the fan controls, but since you are talking about the Dell I know there won't be any settings available to play with.

But maybe resetting the BIOS would reset the fan functions?

Just thinking out loud: On a cold boot, while the components may be cooler (possible), the main thing is that all residual data in RAM has dissipated - all registers are "clean". On a warm boot (restart) the RAM maintains power and registers can still be holding data. Either way the BIOS restarts fresh. On restart the temp readings on the MB will start higher (faulty sensor?). Waking from sleep does not restart the BIOS, all data remains in RAM. A very strange issue indeed.

Have you tried playing with Windows Power Settings?
My System SpecsSystem Spec
29 Aug 2010   #9
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Quote   Quote: Originally Posted by whs View Post
I do not think so. The racket is just from the fan revving at top speed. It is not an unusual noise with crackling or so - just the high fan speed. Else (other than at restart) the fan is very quiet.
Are you using any fan controller or monitoring software? Like maybe Speedfan? I have a similar problem, but with my rig, it happens on wake up from sleep. My problem was caused by Speedfan. Just a thought...
My System SpecsSystem Spec
30 Aug 2010   #10
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Hi guys, thanks again for all the good input. Maybe an update of the BIOS fixes it. I will look into that. But I do not think it really has anything to do with the temps per se. Even if I do a half hour video editing where all 4 cores run at nearly 100%, the fan speed increases only a very small amout. One would think that with such a heavy duty job the temp would increase and the fans would run at top speed - which they don't.
My System SpecsSystem Spec
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 Fan racket at restart




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