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937 posts

Ultimate Geek


# 78122 27-Feb-2011 22:46
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Looking for some advice on some quiet case fans for my PC. I believe they are the 120cm variety. Any recent experiences would be valuable, I'm not looking to spend much but I'd like to try and cut the noise down a bit. Has anybody tried using insulation on the case to try and muffle sound? I have some foam which i could use but I'm wondering if that would make the case hotter? The actual case has to live in the cupboard at the moment, not ideal in terms of heat/air circulation but means 'little hands' can't poke around it.

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gzt

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  # 444406 1-Mar-2011 13:00
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In frustration I once gaffer-taped an old t-shirt folded in several layers to the inside of a case panel. Horrible old case with lots of buzzing, the even horribler mod quietened it down to the max.

Temperature was not a concern at all though, I never measured it.

There are mid priced ($20) 'quiet' case fans around, if your bios does not support variable fan speed in response to cpu/mb temperature (asus bios has cool-and-quiet) then you can get a software solution (speedfan) to do mostly the same thing + alerts if anything exceeds parameters.

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  # 444487 1-Mar-2011 16:08
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CutCutCut: Looking for some advice on some quiet case fans for my PC. I believe they are the 120cm variety. Any recent experiences would be valuable, I'm not looking to spend much but I'd like to try and cut the noise down a bit. Has anybody tried using insulation on the case to try and muffle sound? I have some foam which i could use but I'm wondering if that would make the case hotter? The actual case has to live in the cupboard at the moment, not ideal in terms of heat/air circulation but means 'little hands' can't poke around it.


New 120mm case fans in the 1500-2200rpm speed range which are in the low 30dB's are ~$25-30 each.
http://www.computerlounge.co.nz/components/componentlist.asp?parttypeid=40&t=3

What fans are in there now, what's the rpm etc?

If you have a bunch of 2000-3000rpm 120mm fans in there is might be a cheaper option to mod their connection to the psu to use 5v or 7v instead of 12v which will slow down the rpm and reduce noise.
http://www.silentpcreview.com/article6-page1.html

A fan controller is another option if you have existing fans:
http://www.computerlounge.co.nz/components/componentlist.asp?parttypeid=111&t=3

Foam or rubber can help with vibration related noise but vibration noise may or may not be an issue depending on the case.

A cupboard is not a happy place for a PC, depending on the cupboard you could add some vent holes to stop heat building up.





 
 
 
 


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Ultimate Geek


  # 444545 1-Mar-2011 19:43
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I highly recommend Scythe fans, very efficient and quiet:
http://www.computerlounge.co.nz/components/componentview.asp?partid=7153




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937 posts

Ultimate Geek


  # 444619 1-Mar-2011 22:21
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Yes, I need to pull the pc apart when I have a chance and check out the fans more closely. Actually while I'm there I'll test to see which one(s) are the nosiest. That's a good point about asus motherboards as I actually have an asus motherboard, an older model but I should check to see about fan control. I think they're just running at a constant speed right now. I might try the foam, I think the main noise is fan noise not so much vibration but I need to have a closer look I think.

Yes I know it's not the happiest place for the PC to be in there but probably safer in there for now. I did think about trying to vent it into the ceiling but it may be more hassle than it's worth.

gzt

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  # 444754 2-Mar-2011 13:00
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If it is an older machine, removing accumulated dust and dirt from the fans will quieten it down a bit. The accumulation creates additional vibration and flow resistance. Check the CPU fan as well, smaller fans tend to be responsible for high frequency noise.

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