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4pin into 3pin CPU Fan Power?

post #1 of 4
Thread Starter 
Just had delivered a ARCTIC COOLING FREEZER 64 PRO after some of the folk on here recommending it...

What i noticed right away was the fact it needs a 4pin power connector on the motherboard.

MY motherboard only uses a 3pin power connector to power the CPU fan.

NOW...what does that extra 4th pin do?
What i am thinking is can the fan run on only 3pins?
with the 4th pin being an extra fancy thing connecting it to the bios or a sensor?!

ie having the three pins connected with 1 of the pins being left idle...

I I I (I)........ - Fan (I) = Spare 1, either on left or right side
I I I............ - Motherboard
DMan v3.0
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DMan v3.0
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post #2 of 4
You can run it fine on 3 pins. One pin just wont be connected.
Revival
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Revival
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post #3 of 4
Thread Starter 
phew!...
thank god for that!
DMan v3.0
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DMan v3.0
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post #4 of 4
the fourth pin is for PWM rpm control. Without it the fan will run full tilt unless the mobo can under volt it
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Chuckle2Tits
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