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HP Chassis 3 pin fan and Asus 4 pin motherboard?

Hi all, I have an Hp p7 1245. The chassis fan is 3 pins. My new motherboard installed inside is 4 pins. Is it safe to put my chassis's 3 pin fan to my ASUS's 4 pin motherboard?
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  1. Best answer
    Yes, it is safe to use your fans on the board. The 4th pin is used to change the speed of the fan, it's not necessary for the fan to run.
  2. If you look at the 4 pin fan header on the motherboard you will see that it also accepts 3 pin fans. This will work fine for your system.
  3. Yes, your fan will spin.

    Also, some fans can be controlled by the motherboard. This requires three things:

    1) Variable fan
    2) Motherboard fan control supports the fan (in this case the fan is Voltage)
    3) Fan control software

    I suspect your case fan is non-variable but if it's not then you MAY be able to control it via the motherboard fan control software (which you should already use for your CPU).

    Optionally you can REPLACE the fan with a variable one if desired, in which case I recommend something like a 500RPM to 1800RPM (variable), PWM, 12cm fan if that would fit.
  4. hi all, I installed the chasis fan and when I start up my computer, the screen said "Windows system repair (recommended)" And now my screen is performing system repair. Could my chasis fan be incompatible?
  5. Hmmm after waiting for 5 minutes the computer is running perfectly fine now. Weird how I went into System Repair after connecting my old chassis's fan to my new motherboard o-o
  6. By the way, is my fan being automatically put on 100% speed? My chassis fan is considerably louder now.
  7. Willy156 said:
    By the way, is my fan being automatically put on 100% speed? My chassis fan is considerably louder now.


    It will run at the same speed as it did in your last case, unless you had a fan controller.
  8. I did not have a fan controller and my old motherboard had 3 pins instead of 4 pins. My new motherboard is currently using my old chassis fan and is louder
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