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How should I power my fans?

Hi guys I just finished building my new computer. The problem I have is understand how to power my fans and how I should position my fans.

I am using the
Corsair 300R Case http://www.newegg.com/Product/Product.aspx?Item=N82E16811139011
and
H60 Water Cooling
http://www.newegg.com/Product/Product.aspx?Item=N82E16835181015

Lastly mother motherboard (Asus p8z68)

The mobo only has 1, 3pin port and 3 4pin ports for fans. I am Using the 3 pin for the radiator and one of the 4 pins for the fans.

I have two fans which came with the case and I am not using. Unfortunately they are both 3 pin fans!

I like keeping my computer minimal, less is best. How do I power these two fans? Or do I need to buy new fans?


As far as positioning I have the fan and radiator on the back. A 140MM fan in the front with no power and lastly a 120MM fan laying around where should I put it? Top? Side? Front?
4 answers Last reply Best Answer
More about power fans
  1. Best answer
    normally 4 pin fan headers will connect to a 3 pin fan just fine. 4 pins are for PWM fans. 3 pin are for voltage and RPM sensing. I just connect mine to the board (for simplicity and to get the rpm) but you could use molex adapters if you felt like it.
  2. unksol said:
    normally 4 pin fan headers will connect to a 3 pin fan just fine. 4 pins are for PWM fans. 3 pin are for voltage and RPM sensing. I just connect mine to the board (for simplicity and to get the rpm) but you could use molex adapters if you felt like it.

    Interesting I didn't think it was okay to connect a 3pin to a 4pin I will give it a try!
  3. I would get a fan controller for the Fans that should be arranged in a Push/Pull configuration....Put the fans blowing from back to front and throw the extra fan up top blowing out of the case ...Just my two cents
  4. Best answer selected by johnkerry.
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