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#1
20th Aug 2008, 09:09
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ive just ordered three 40mm 3 pin fans and was wondering if it would be possible to connect them in parallel to the sys. fan header, if i parallel the power and then use the rpm lead from only one, would they work?
anyone tried this before? thanks chris |
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#2
20th Aug 2008, 10:16
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It might,, but you don't want to exceed the wattage the motherboard can put out on that header. Does the motherboard only have one extrafn header?
Also, I think the RPM idea would work, technically, but the motherboard might not like it. Best would be to put them on a molex, wit one on the header. Have you thought about wirng them up in series, then they would all run a 1/3 slower. Or doing a 7 volt / 5 volt mod to them.. Google it. Also,, 40mm fans are normally very noisy. The bigger the quieter.
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serverguy  My System: Eclipse
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#3
20th Aug 2008, 13:02
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that looks like a really good idea, ill have a go tomorrow, wonder if i could put a variable resistor on the 5v line and see how low i can drop it before the fans cut out? would that damage the psu?
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#4
20th Aug 2008, 14:46
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Wouldn't damage the PSU but most fans won't start up below 5V.
If you're into electrickery you could build a simple Pulse Width Modulation controller (Google it) Or just mod them like this.. http://www.techpowerup.com/articles/other/137 You can just play around with it until you get the right speed / noise level.
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serverguy |
