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4 pin fan 3 pin header

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  • Fan
  • Speed
  • Systems
Last response: in Systems
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March 17, 2014 7:03:11 AM

I bought a fan that has 4 pins but my mobo has only 3 , I know that the 4th is made for control so , my fan is probably going to run at max speed , is that going to make it's lifetime shorter? PS: I'll buy a new mobo in next month

More about : pin fan pin header

March 17, 2014 7:10:32 AM

You can still control the fan with a 3 pin but not as accurately as with a 4 pin (usually controlled in the BIOS or software that came with the motherboard). Usually all motherboard have AT LEAST 1 4 pin header. I assume that is being used by the CPU fan. it wont decrease the lifespan of the fan. I also question why you are going to buy a new motherboard?
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March 17, 2014 7:14:43 AM

H4X3R said:
You can still control the fan with a 3 pin but not as accurately as with a 4 pin (usually controlled in the BIOS or software that came with the motherboard). Usually all motherboard have AT LEAST 1 4 pin header. I assume that is being used by the CPU fan. it wont decrease the lifespan of the fan. I also question why you are going to buy a new motherboard?


Because I want a new CPU and my current has an old AM3 socket , this one has also just 1 fan header , and it has only sata 2 ports , and only 1 PCI-Express port, and it has no USB3 port :/  ( Biostar NF520D3 ) But back to the fan thing , can the mobo control the speed of the fan? Or is it always going at the same time?
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March 17, 2014 8:02:06 AM

You can control it in the BIOS (5 volt 7 volt or 12 volt).
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March 17, 2014 9:15:14 AM

H4X3R said:
You can control it in the BIOS (5 volt 7 volt or 12 volt).


But I mean automatically
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March 17, 2014 9:17:59 AM

It doesn't change the fan speed automatically.
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March 17, 2014 9:52:54 AM

H4X3R said:
It doesn't change the fan speed automatically.


not with 3 pins , or?
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March 18, 2014 1:17:15 AM

with 3 pins AND 4 pins you have to control it manually unless it is the CPU fan header, which will adjust speed depending on CPU temps.
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