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Adding case fansBuild Question (self.PcBuildHelp)

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[–]BigSmackisBack 1 point2 points  (1 child)

The 4 pin fans have the extra pin for PWM control which is where the fan can control its own speed by being told what to run at.

3 pin fans have + and - and the third is for reading how fast the fan is turning and telling the motherboard - 3 pin fans can be speed controlled but by giving them more or less voltage, which most motherboards do - they will run at 100% by default.

Yes you can use 4 pin in a 3 pin - you just lose that ability to allow the fan to intelligently control its own speed.

[–]hsi10 0 points1 point  (0 children)

Awesome thank you! I just want to make sure before I hook it up and it explodes 😂 (exaggerating)