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?
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.
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.
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.
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.
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.when the machine figures this out fan speed (and noise) goes back to normal.
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?
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.
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