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4-pin fans

Last response: in Components
December 22, 2011 3:52:04 PM

I see my Intel DZ68BC mobo has 4-pin fan connectors. I can't, however find any fans on the market that has 4 pins. What does the 4th pin do and does anyone know who makes 4-pin fans?

I think it controls the fan speeds and if possible I'd like to have the mobo control the fans just to see how that works out.


More about : pin fans

December 22, 2011 4:05:06 PM

It's rather silly; only CPU HSFs are 4-pin. You can still connect 3-pin fans to 4-pin headers and get speed control.
December 22, 2011 4:09:05 PM

One wire is ground, one wire is power, one is fan tach, one is fan speed adjustment. You can get fan speed adjustment with 3 or 4 pin fans. I have noticed with some 4 pin fans they can make a horrible squealing noise if not running at 100%.
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Best solution

December 22, 2011 4:09:27 PM

Generally 4pin connectors on mobo are for the cpu cooler = allows speed adjustment.
Any additional 4pin fan headers are a bonus.
4pin fans are referred to as PWM fans.
December 28, 2011 11:19:47 PM

Best answer selected by karsten75.