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 Post subject: Silencing coil-whine: an alternative
PostPosted: Wed Jun 01, 2005 4:22 am 
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Joined: Mon May 23, 2005 12:04 am
Posts: 274
Sry if i posted in the wrong forum.

I'm yet another guy suffering from bad quality coils on my mainboard. It seems to be heat-related coz it only happen when the coil gets hot.

Hot, huh? So i thought, why not add a heatsink?
So i got a ~40mmx40mm (removed from a spoil i740) heatsink and placed it so that it touches the coil at one end. I didn't use thermal compound for this, but judging from the temperature of the heatsink i can be positive that it is working. But, after a certain temperature is reached the whine resumes.

So i added a 2600rpm 80mm fan (couldn't find my 40mm fans). This combo worked out; previously i tried fan only and it failed.
BTW this com is no where near quiet, but the coil whine is really irritating.

Will try passive cooling with a P4 1.8Aghz stock heatsink.

Guys, try this out if your coil-whine problem is heat-related.

Update: Okay, P4 heatsink up and running (not really coz it is passive). Aided by the fan from the PSU this is gonna cool a lot considering it being bigger than the CPU heatsink. I think the sheer weight of the heatsink alone can suppress the coil whine already. :lol:
Put the 40mm heatsink on another coil suspected of slight coil whine.

2nd update: Thanks to low airflow in the case, the P4 heatsink still gets too hot after a while. Trying it with 5Ved fan (quite quiet actually) now.


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 Post subject:
PostPosted: Wed Jun 01, 2005 3:40 pm 
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Joined: Sun May 09, 2004 12:14 pm
Posts: 134
Location: Middle Earth
i lowered the CPU voltage by 0.1v and the whine is almost gone.

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 Post subject:
PostPosted: Sat Jun 04, 2005 2:09 am 
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Joined: Tue May 31, 2005 10:26 pm
Posts: 6
Location: Sydney AU
Seal it by painting it with laquer, shalack (sp) or even epoxy..


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 Post subject:
PostPosted: Sat Jun 04, 2005 3:21 am 
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Joined: Mon May 23, 2005 12:04 am
Posts: 274
retrofitter wrote:
Seal it by painting it with laquer, shalack (sp) or even epoxy..


If mainboard spoil how to RMA? :lol:

Actually I'm trying silicone now. At least can peel off. :lol:


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 Post subject:
PostPosted: Sat Jun 04, 2005 3:44 am 
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Joined: Tue Jun 03, 2003 12:57 am
Posts: 347
how about heatshrink?

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 Post subject:
PostPosted: Tue Jun 07, 2005 11:01 pm 
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Joined: Thu Jan 20, 2005 8:58 pm
Posts: 561
I believe it's spelled "shellac"...

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