Solved Replacing CPU cooler 4-pin PWM fan to 3pin fan.

May 3, 2012 at 23:09:26
Specs: Windows 7 Ultimate w/ SP1, Intel Quad-Core i5-760/ 4.00RAM
Due to product unavailability & since my aftermarket CPU cooler 92mm 4-pin PWM fan needs replacing, would it make any difference if I opt to replace it with a 3-pin fan? Will this be a problem?

See More: Replacing CPU cooler 4-pin PWM fan to 3pin fan.

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#1
May 4, 2012 at 04:23:07
✔ Best Answer
Three pin fans are not speed controlled by your motherboard and will run a high speed (and noisy) unless you use a fan speed control. It will take a bit of experimenting to get the best speed for cooling and noise level with occasional continued monitoring. You may find you need a higher setting for summer and during heavy usage/gaming. I prefer staying with a 4pin set up since your motherboard controls this for you.

You have to be a little bit crazy to keep you from going insane.


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#2
May 4, 2012 at 05:58:35
I totally agree with you but as I've mentioned earlier, 4-pin PWM 92mm fan(s) are not that easy to acquire specially most store here carry 80 &120mm fans. So I gather from your reply that it's safe to use a 3-pin fan as an temporary solution while I try to purchase a 4-pin fan.

PS. I've just managed to go through the manual of my Asus P7P55D-E LX board & it seems that my board has a onboard hardware monitoring CPU Fan Control feature in the BIOS that allows the user to set the appropriate performance level of the CPU fan with 4 pre-set profiles: Standard (automatically adjust's the fan according to CPU temp), Silent, Turbo & Manual. And why is it set to it's default value (Disabled)? Will enabling this feature work on a 3-pin fan? Thank you for your time.


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#3
May 4, 2012 at 15:12:56
Look:
http://www.newegg.com/Product/Produ...
The description does not say 4 pin but if you click on the picture and scoll through the pictures you will see one that shows 4pin 4wire connector and the reviews confirm this.
As far as I know 3 pin fans run at max speed only. This is not as critical on large 120mm fans as they are slower turning but more more air and do not have the whine of the smaller fans on many CPU coolers.

You have to be a little bit crazy to keep you from going insane.


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#4
May 5, 2012 at 12:45:07
"4-pin PWM 92mm fan(s) are not that easy to acquire specially most store here carry 80 &120mm fans"

Why buy a 3-pin fan locally when you can order exactly what you need online? You can buy a new 4-pin fan for $5-10, or an entirely new heatsink/fan for $20 or less.

http://www.newegg.com/Product/Produ...

http://www.newegg.com/Product/Produ...


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