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PC Fan Problems

timothyw9 Avatar
8y, 8m agoPosted 8 years, 8 months ago
Hi there. Everytime I switch my PC on from cold (when its been off for 1 or 2 hours +) it always makes a really annoying gnrrrrrrrrr....... sound.

I've got an Athlon 64 3700+ with AC Alpine Cooler and a Geforce 3 Ti 200.
I don't think its the 2 case fans and probably not the PSU fans as the PSU is newish. (1 to 1 and a half years old maybe?
I also have a Geforce 3 Ti 200 which I have since I built the PC (I used to have an Athlon XP 1800+ but I think I broke the mobo or something.)

Any idea where its coming from?
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timothyw9 Avatar
8y, 8m agoPosted 8 years, 8 months ago
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#1
Open it up, turn it on. Gently touch each fan until you work out which one is the culprit. Replace said fan.
#2
This happened to mine. apparently they have a battery which usally needs replacing after approx 18 months- 2 year.
this was news to me. I know nothing about computers and was amazed to find ot they have a battery??
Its flat (like a very large watch battery).

Hope this solves your problem.
#3
"Everytime I switch my PC on from cold (when its been off for 1 or 2 hours +) it always makes a really annoying gnrrrrrrrrr....... sound."

Does the sound lessen once the PC is up and running?
#4
miss money saver
This happened to mine. apparently they have a battery which usally needs replacing after approx 18 months- 2 year.
this was news to me. I know nothing about computers and was amazed to find ot they have a battery??
Its flat (like a very large watch battery).

Hope this solves your problem.


That battery will have nothing to do with a noisy fan.
#5
Yep its just a clogged up/worn out fan. When the PC starts up it gives the fans full power for a few seconds, so any niggles with the fan become very apparent. Just don't use a duster to clean it!
#6
miss money saver
This happened to mine. apparently they have a battery which usally needs replacing after approx 18 months- 2 year.
this was news to me. I know nothing about computers and was amazed to find ot they have a battery??
Its flat (like a very large watch battery).


It is pretty much the same thing as a watch battery actually, it's primary function is to keep the clock in your computer counting time when you've switched it off. It needs to do that so you can schedule your nightly backups without having to tell the computer what time it is when you turn it on.

It's other function is to power the bios information storage, which could explain the fans being louder if you'd set the bios to adjust them for temperature.

I don't know who told you they need to be replaced every 18 month to 2 years but I've certainly never had one fail on me that soon. (In fact I've never seen one die at all on one of my computers).

'gnrrrrrrr' sounds like an angry dog, perhaps if you could provide a more detailed description of the noise it'd help. How loud is it? How long does it last? Does it sound anything like the normal sounds a computer makes?

If the sound is only happening after 1-2 hours being off and not after 5 minutes of being off then I'd guess it's something more complicated than the fans.
#7
its all foreign to me??? just thought it might help:oops:
sorry
#8
I think its my graphics card but I'll check the PSU as well.
#9
Mine used to make a grrrrrrrrrr sound as if the computer was working really hard!!!! it would calm down eventually
however it was really slow doing everything else.
the noise with me could last up to 20 mins.
the new battery sorted it out. (this was done be a friend) not some big computer shop, so I know I haven't been conned.
As I said not good on computers just giving a honest genuine experience
#10
miss money saver
Mine used to make a grrrrrrrrrr sound as if the computer was working really hard!!!! it would calm down eventually
however it was really slow doing everything else.
the noise with me could last up to 20 mins.
the new battery sorted it out. (this was done be a friend) not some big computer shop, so I know I haven't been conned.
As I said not good on computers just giving a honest genuine experience


Yeah, I wasn't accusing you of lying. It just seemed a bit wierd that the cmos battery could affect the fans, although computers are complicated things. You friend must have had a fun time tracking that fault down :-D

Let us know if you find out what's causing the strange noise.
#11
It usually only lasts 1-5 minutes at most. I'm getting a 9800XT so when this arrives it'll be easier to find the culprit as well.
#12
Be VERY careful if opening up your psu to change a fan, you may end up with a nasty shock.
#13
If it does it just when starting up its more likely the motherboard fan (chipset fan). It will start up at full speed and then go quieter once its thermal probe gets a temperature reading. Because it doesn't know the temperature it runs at top speed to be on the safe side, it has probably always done this but a little dust or something similar could be making it sound worse than normal.

It will look something like this image here: http://images.planetamd64.com/pyr0/DFI_SLI-D/Board/Large/Chipset%20Fan.jpg

If you can locate it and give it a little clean hopefully it will stop making such a loud noise.

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