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Old 14th August, 2004, 09:23 PM
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How to Fix a Noisy Northbridge Fan...

On many Abit motherboards (and probably many other manufacturers as well), the northbridge fan is the first component to begin to fail.
The northbrigde (NB) fan slowly begins to develop a grinding noise and slowly becomes the noisiest component in your system. The flimsy sleeve bearing of the fan itself may not always be at fault. Sometimes (and in my case as well), the fan's heatsink in which it is enclosed is at fault. The fins of the fan rub against the housing, creating the grinding noise.

The solution: Remove the top fan "finger guard."

Before:
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Old 14th August, 2004, 09:24 PM
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After:

The fan is now whisper-quiet. I had to put my ear within 1-2cm of the fan intake to actually hear it.

In the second picture here, note the fan fins rising above the "rim" of the fan. (click it to enlarge to see better.)
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How to Fix a Noisy Northbridge Fan...-nnbf-001.jpg   How to Fix a Noisy Northbridge Fan...-nnbf-002.jpg  
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Last edited by RussianMissile1; 15th August, 2004 at 03:02 AM.
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Old 14th August, 2004, 10:11 PM
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Front page work RussianMissile1 !!

http://www.aoaforums.com/frontpage/

Thank you!
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Old 14th August, 2004, 10:34 PM
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Quote:
Originally Posted by RussianMissile1
The northbrigde (NB) fan slowly begins to develop a grinding noise and slowly becomes the noisiest component in your system. The flimsy sleeve bearing of the fan itself may not always be at fault.
It may well be that the sleeve bearing wears enough to allow too much play on the fan, and hence the fan blades end up rubbing. Some sleeve bearings can be pretty poor, however they do tend to be quieter than ball bearings!
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Old 15th August, 2004, 03:05 AM
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Quote:
Originally Posted by Áedán
It may well be that the sleeve bearing wears enough to allow too much play on the fan, and hence the fan blades end up rubbing. Some sleeve bearings can be pretty poor, however they do tend to be quieter than ball bearings!

actually, i found that i could not push the fan hub down any further than it already was. the frame itself is bendable down further, but that puts unneccesary stress on the fan.
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Old 16th August, 2004, 04:34 AM
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That was a crappy design for a HSF to start with, what was Abit thinking?
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Old 16th August, 2004, 05:08 AM
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They were thinking that every overclocker in the world would be modding the board and putting their own cooling on it, so they put the cheapest fan they could find that would let the thing run 200 MHz FSB clock.
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Old 16th August, 2004, 11:29 PM
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Quote:
Originally Posted by Daniel ~
Front page work RussianMissile1 !!

http://www.aoaforums.com/frontpage/

Thank you!
Oops shouldnt have aid that but................................... front page news for changing a fan??????
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Old 16th August, 2004, 11:57 PM
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Front page "work", the manner in which it was fixed.
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Old 17th August, 2004, 09:35 AM
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Fair enough, nice job BTW
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