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Connecting cpu fan to power supply

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  • Power Supplies
  • CPUs
  • Components
Last response: in Components
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September 25, 2010 8:36:17 PM

hey guys i was wondering if the cpu fan would run full speed (2000 rpm) when connected to the power supply at all times. because i bought a cpu fan that had a 3 pin connector i cant plug it into my mobo header. because it has 4 pins. thanks

More about : connecting cpu fan power supply

a b ) Power supply
a b à CPUs
September 25, 2010 10:34:02 PM

You can plug it into your 4-pin, it has a ridge to help you align it to the power connector.
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September 25, 2010 10:46:52 PM

so i CAN plug the 3 pin cpu fan to my 4 pin motherboard header? what is the extra pin there for then?
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a b ) Power supply
a b à CPUs
September 25, 2010 11:01:37 PM

PWM
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September 26, 2010 1:37:48 PM

k3v1n_123 said:
so i CAN plug the 3 pin cpu fan to my 4 pin motherboard header? what is the extra pin there for then?


Yes,you can connect a 3 pin cpu fan to a 4 pin motherboard header.The fourth pin is for PWM. The PWM fan has the extra fourth pin, on which is sent a PWM control signal. The fan does the real work of reducing speed. They will work as normal 3-pin fans when reduced by linear voltage control.
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September 26, 2010 5:42:23 PM

Best answer selected by k3v1n_123.
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a b ) Power supply
a b à CPUs
September 27, 2010 12:09:19 AM

This topic has been closed by Mousemonkey
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