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PC fan is having trouble with the 4 pin connector

Hello,
i have a red LED coolermaster fan with a 4 pin connector and i plugged it into the 4 pin connector on the motherboard and the leds were on but very dim and the fan wouldnt spin, so then i plugged it into the 3 pin connector on the motherboard and the fan was working fine but i want to be able to have it in the 4 pin connector so i can cchange the speed because its a very fast fan
6 answers Last reply Best Answer
More about trouble connector
  1. benprestwood said:

    I have a fan with the 4-pin connector and I plugged it into the 4-pin connector on my motherboard, and the LED was working, but was very dim, and the fan wouldn't spin, so then I plugged it into the 3-pin connector on my motherboard, and the fan was working fine.


    Looks like the 4-th pin on your fan's connector is defective. Maybe RMA it?
  2. master_chen said:
    Looks like the 4-th pin on your fan's connector is defective. Maybe RMA it?

    I dont want to sound like a noob but whats an RMA ?
  3. benprestwood said:
    What's an RMA?


    RMA
  4. Do you have other 4 pin fans that you can plug into the slot?

    I would first trouble shoot this before getting a replacement.

    What Cooler Master fan are you using by the way and when did you purchase it?
  5. Best answer
    Some motherbards have a tempature sensor onboard so when he case temp. gets so high it will start the PWM fan, the higher the temp. the faster the fan will spin . Read motherboard manual and it should tell you if you have that functionor not.

    PWM, means pulse width modualation
  6. Best answer selected by benprestwood.
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