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Thread ID: 64396 2005-12-13 20:43:00 Cooling Fan Noise bk T (215) Press F1
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412453 2005-12-13 20:43:00 Just added a small little cooling fan to my old PIII box. It works Ok except that it produces a high-pitch noise which is quite annoying.

What's the remedy?

Cheers
bk T (215)
412454 2005-12-13 21:27:00 Not to sure but i'll chuck some ideas that may help your way....

I supose youv'e tried oiling the bearings?

Maybe you could wire up a govener(?) type control to slow it down so it doesnt spin so fast.

Maybe another fan?
lazydog (148)
412455 2005-12-13 21:50:00 Look here (www.dansdata.com) Greg (193)
412456 2005-12-13 22:18:00 Well there are 3 possibilities:

1) Fit a similar sized fan which has a lower rpm setting. You may have to sacrifice CFM for low noise.

2) Volt mod the current fan to 7V (www.ocforums.com), this will make the fan spin slower and thus it will be a lot quieter (again at the expense of CFM)

3) Install a bigger fan. 120mm is recommend (these fans spin at low rpm but they still move larger amounts of air than the smaller 80mm or 92mm fans) The 120mm fans provide a good balance between effective cooling and low noise operation.

Hope that helps
chiefnz (545)
412457 2005-12-13 22:45:00 I just had the CHA fan start to make noise today, and it kept me from booting. The sensor would shut the boot off after a few seconds..but I still heard something noisey for the few moments it was trying.

I took the side case off..hit the power and found out which fan was making all the noise..removed it and gently pulled off the foil cover on the back of it. I placed two tiny drops of sewing machine oil on the bearing using a toothpick to place it where I wanted and re-installed it. It's running quietly and happily..so am I..er...happy that is.

Maybe it was due for an oil change anyway. :D
SurferJoe46 (51)
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