Which fan is making all this noise?

mangodrinker

Honorable
May 25, 2013
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Hi, I recently built a budget computer and I am having some difficulties trying to figure out which of my fans is causing all this racket. Any help would be appreciated. I have a Rosewill Galaxy-02 with three fans (not sure what the bearings are) and my Athlon x4 760k stock AMD heatsink fan which I suspect is the culprit. I also have my 650 TI boost's fan if that could be the problem. Thanks for the help.
 
Solution
Empty paper towel tube, or rolled up sheet of paper. Hold it to your ear. Point it at each fan.

Or, stop them with your finger. When the noise goes away, it's that one.