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Replacing a fan. Incompatible?


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#1 MuscledFireman

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Posted 13 May 2017 - 09:23 PM

I bought a JetFlo 120 120x120x25mm Fan from Amazon. The fan on my four-year-old Ibuypower computer is dying, you see.

 

I phoned ibuypower and the guy told me any 120mm fan would fit.

 

Well this fan's hookup has 4 slots for the prongs and my setup only has 3.

 

Not only do the prongs not match the slots seem incompatible, like trying to fit a Nintendo Game into an Atari.

 

Are there dongles to switch this?



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#2 JohnC_21

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Posted 13 May 2017 - 09:49 PM

The fourth pin is for fan control. Usually it's just a matter of overhanging the connector. 

 

https://allpinouts.org/pinouts/connectors/motherboards/motherboard-cpu-3-pin-fan-connector/

 

Is this the type of connector for your fan?

 

https://www.moddiy.com/products/Fan-4%252dPin-PWM-to-3%252dPin-Sleeved-Adapter-Cable.html

 

http://www.frozencpu.com/products/image/8881/cab-169_2.jpg/cab-169/4-pin_PWM_Male_to_3-pin_Female_Adapter_Cable_24_-_Sleeved_Black_CB-PWM-3F.html



#3 MuscledFireman

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Posted 13 May 2017 - 10:20 PM

 

 

Perhaps I should be clearer..

 

My NEW fan has four female slots.
My OLD fan has three female slots.

My OLD fan connects to three male prongs.
My NEW fan cannot connect to the three male prongs.

 

I cannot provide a picture, however.



#4 JohnC_21

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Posted 14 May 2017 - 08:33 AM

In the link I provided are the fan connectors similar enough where you can use the 4 pin connector of the fan to the three pin connector of the motherboard?

 

connector_mbfanpwm_4to3pin.png

 

If not then the connector I linked to has a 4 pin male to 3 pin female connector.

 

IMG_0637__33996_zoom.JPG



#5 MuscledFireman

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Posted 14 May 2017 - 08:44 PM

https://s7.postimg.org/duroe5g97/DSCN0651.jpg

 

https://s21.postimg.org/g8iwvm31j/DSCN0652.jpg

 

Those are pictures of the connector for the new fan.



#6 JohnC_21

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Posted 14 May 2017 - 09:15 PM

In the image I posted the large connector on the end is a 4 pin male with a box connector. Your 4pin female from the fan would connect to it as in the below image and the three pin female on the other end will attach to your motherboard. 

 

3tb_1309091916362w91384678.jpg



#7 MuscledFireman

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Posted 14 May 2017 - 09:16 PM

So you are recommending that I buy that adapter?

My new fan has an LED light in it. My old fan does not.

Could that matter?



#8 JohnC_21

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Posted 14 May 2017 - 09:34 PM

You need the adapter but you may find one locally or cheaper on another site. I believe Amazon also sells them. As far as the LED goes, I don't believe it will make a difference. I believe the LED will still light as the fourth pin on the connector is for controlling fan speed. Because you only have three pins the fan will run at full speed.

 

https://www.ekwb.com/blog/what-is-pwm-and-how-does-it-work/

 

I attached an image of a 4 pin connector on the motherboard. You will still have the 12 v signal lighting the LED from pin 2. Pin 4 is for fan control which you will not have.

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