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k281 cabinet preinstalled case fans 3 pin or 4 pin

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  • Cooler Master
  • Cases
  • Components
Last response: in Components
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August 20, 2014 11:15:27 PM

I am planning to purchase coolermaster cabinet k281 which comes with preinstalled case fans but i dont know that the fans are 4pins or 3pins as i want to connect the fans with fan controller nzxt sentry2 which support 3pins fans

More about : k281 cabinet preinstalled case fans pin pin

August 21, 2014 6:16:07 PM

Both front and rear fans are like this:

3 wire MB header with a 4 wire Molex adapter.
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August 21, 2014 8:18:40 PM

3pin wire is for motherboard and 4pin wire molex adaptor is for psu ???
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Best solution

August 22, 2014 8:48:08 AM

Rahulshukla said:
3pin wire is for motherboard and 4pin wire molex adaptor is for psu ???


Yes. The large Molex plugs into any matching Molex from the PSU. The fan will always receive +12V that way and run at full RPM. The Molex connector is 4 pin, but only has 2 pins wired.

If you use the small 3 pin connector and plug it into one of the MB fan headers, you may be able to control the speed of the fan. I say 'may' because many boards now have abandoned the 3 wire fan headers for 4 wire PWM headers. Those usually only allow fan speed to be controlled if you use a 4 wire PWM fan. You can still use the header for 3 wire fans, but chances are there will be no control of the fan's speed.
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