An additional fan is the source of most of my computer's noise?

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AntiElephantMine

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Aug 25, 2013
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I built my computer a year ago. Then about a month later I added two additional fans to the top. I'm not sure how loud my computer was initially when I built it, but I realised today that one of these additional fans is the source of 90% of my computers noise. Why does this fan have to be making so much noise during idle, despite the fact that my computer was fine before I added these additional fans anyway? Gaming of course is a completely different situation. Is there any way I could control my fan speeds better?

 
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Onus

Titan
Jan 27, 2006
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Fan bearings ought to last more than a year, but some cheap fans may not make it so long. If it is wind noise though, slowing it down will help. If it plugs into a molex, you'll need to use a fan controller of some sort or wire in a series resistor (200-500 ohms should do it, use at least a 1/2W resistor). If it plugs into your motherboard using a 3-pin connector, you might be able to set the fan speed in the BIOS (may not work on some ASRock boards, contrary to documentation). Otherwise, replace it with a slower speed fan, such as 800RPM-1000RPM max.
 
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AntiElephantMine

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Aug 25, 2013
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0
10,530
Thanks for the replies. It isn't a vibrational noise, simply an operational one. It is a 3-pin connector, and I've shoved it in SYS-FAN 4 on my MB. The strange thing is I can't locate its RPM in CPUID. That fan doesn't seem to be listed at all (I unplugged it from the MB, and all the same fans were listed in CPUID [I should've expected one less fan]).
 
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