3 pin cabinet fans running at full speed all the time

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kumarvimal

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Feb 21, 2015
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I recently bought some 3 pin fans that connect to 4 pin fan headers on my motherboard. They are continuously running at 2000 rpm all the time and hence my system is very noisy.

I searched for this topic and found that we have to do some jumper setup and tweak a few settings in my bios. Can anyone guide me through the process?
 
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The on-line manuals I found did not show me the specific BIOS Setup pages used to make adjustments of fan operation. However, they appear to indicate that, although the mobo fan ports are all 4-pin and use PWM control signals, they CAN adjust to 3-pin fans. They seem to say that the mobo's chassis fan ports will detect the presence of 3-pin fans automatically and adjust themselves to control such fans by changing voltage, rather than by using the PWM control system. Apparently this is not happening in your machine.

The only thing I can suggest is that you go into BIOS Setup yourself, find the place in Configuration ... Fans and Settings and see if there is a place where you can specify that the fan you have connected to a particular...
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Paperdoc

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The on-line manuals I found did not show me the specific BIOS Setup pages used to make adjustments of fan operation. However, they appear to indicate that, although the mobo fan ports are all 4-pin and use PWM control signals, they CAN adjust to 3-pin fans. They seem to say that the mobo's chassis fan ports will detect the presence of 3-pin fans automatically and adjust themselves to control such fans by changing voltage, rather than by using the PWM control system. Apparently this is not happening in your machine.

The only thing I can suggest is that you go into BIOS Setup yourself, find the place in Configuration ... Fans and Settings and see if there is a place where you can specify that the fan you have connected to a particular port is 3-pin. To get into BIOS Setup, the manual says you must press (I suggest hold down) the F2 key as the POST display finishes, and before it loads the Windows Operating System.
 
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