Then you said 3 pin fan can still be hooked to a 4 pin header on mb. 4 pin fan has 1 more pin for PWM control. Many boards have the ability to control both on there own. Which one is best? PWM is better in most scenario's You can hook a 3 Pin fan to a 4 Pin header and not have issues. 1 wire Power +, 1 wire Negative -, 1 wire Tachometer. 1 wire Power, 1 wire Negative, 1 wire Tachometer, 1 wire PWM control.ĭC fans have 3 pin connectors. PWM fans have 4 pin connectors due to the necessary electronics on in the fan. I have the fans for this installed directly to the motherboard CPU header as I didn't want the hub to just bundle all fans into one, I wanted separate control of the cpu fans/rad/pump.PWM = Pulse Width Modulation, meaning the power pulses to the fan saving electricity and lowering the Electro Magnetic field that coil winding's, located in all fans and electric motors, produce.ĭC in this case means direct current where the fans receive a constant flow of electricity to remain spinning. So in the q fan options it correctly registers that I have 1 chassis fan for controlling (but really it controls all 3 together)įor CPU cooling I am using a Kraken 圆1 and use CAM software to control this, this all works fine however sometimes my bios tells me it doesn't think there is a fan installed on the odd occasion, this is usually sorted if I reboot again. I have the 2 front and 1 rear chassis fans attached to this, and that is plugged into a chassis fan header on the motherboard. I have a feeling it may have something to do with the fan hub I am using which came with the phantex case, but I have installed it correctly and it should work in pwm - I would rather use this if possible as it means less cabling on view at the front of the system. Now, if I install AI suite 3 from Asus I can indeed optimise them correctly though the q-fan software, however over the last year I have had more glitches and errors with AI suite 3 that I wish to do away with it and control everything through the bios instead.but this doesn't work. If I use the optimise option within the bios q-fan controller they will ramp down to a silent setting, but on saving and rebooting they will go straight back to max rpm. I'm having a strange issue with controlling my fans since I built this rig last year, where my chassis fans will just default to max rpm despite me optimising them within the bios.
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