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Case Fan Questions

I just built my new computer the other day, each fan i have has a 3-pin connecter, 3 of my fans came with i think its called a molex plugin where it has 4 pin like things sticking out or the opposite.

My Asus z77 Lk has 3 onboard fan controllers i beleive but they are 4 pins in a row, while the fans regular plugin only supports 3 pins.


Can i buy an adapter to plug my fans directly into my motherboard? or should i buy another molex adapter to plug directly into the psu?
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  1. No adapter needed. The 3 pin connectors will work on the 4 pin connections on the mobo without a problem.
  2. Wouldn't even trying to plug one in damage the 4th pin on the mobo?
  3. Best answer
    Nope. They way the connectors are made, they can only work one way, and you'll see that on the mobo. They're meant to be used with both 3 and 4 pin fans.
  4. I just plugged both my exhaust fans directly into the mobo, but the big fan is Red and at around 400 rpm in the bios, does red indicate a major issue?

    the fan only gets up to 800 rpm i beleive.
  5. Just set it to a lower minimum in the BIOS. My guess is that it's set to something like 600 RPM. You can even turn off the alert completely, if you want.
  6. Eh i just plugged the 200mm fan directly back into the power, the mobo was making it whine by changing its rpms constantly.

    But srsly, ty, now i have all my fans running successfully.
  7. You're welcome. :)
  8. Best answer selected by Daethz.
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