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Connecting a 2 pin GPU fan to 3 pin MB header

C

cwf

Member
Hello Anandtech!

My stock TI4200 fan spins too fast (~5000 rpm) at all times. This creates noise when idle that is unnecessary. My proposed solution:

Hook up the fan to a MB fan header and contol its speed using Speedfan.
However, the fan has a 2-pin adaptor while the MB is a 3-pin socket. Proposed solution to that is to use a 2-pin to 3-pin adaptor. Leading to my question:

Will I be able to control the speed of the fan then?

Thanks,
CWF
 
Perhaps. Although, you won't be able to determine the rpms of the fan, you'll have to go by ear since you don't have the third wire for rmp sensing. Speed fan might object to that in which case you might have to resort to a rheabus situation where you control the speed with a fan.

Keep us posted as to the soution, I'm curious.
 
Thanks. I guess the main issue is how Speedfan tells the fan to adjust speed. If that 3rd wire (rpm sensing) is also used to communicate to the fan the desired rpm then it won't work.

I'll give it a shot.

Just wondering if someone knows what the results will be before I spend time and a few bucks on the adapter.
 
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