3-pin Vs. 4-pin fans

[R2-D2]

Hi all!

I’d like to upgrade of my computer case [stock] fans to quieter and maybe even better performing ones and probably replace my CPU cooler fans just to match others (color, design). Now there are fans with 3-pin and 4-pin connectors (with PWM control) but the majority comes with 3-pin connectors.

1) Are there any particular benefits of using fans with 3-pin or 4-pin connectors?
2) If all the fans will be connected to motherboard, which connector type will provide more flexibility in controlling fans speed?
3) Will I be able to equally control fans with 3-pin or 4-pin connectors both in BIOS and using software in Windows?

If it matters, the fans will be connected to Asus Maximus VII Hero motherboard. Any help would be appreciated and thanks in advance.

 

[Wraith]

3pin or 4pin not really a problem they are both controllable the only difference is the 4pin has PWM (pulse width modulation) which in essence just pulses the electricity to the fan saving overall power consumption.

 

[MadShadow]

Wraithguard is correct. Also, dont bother changing your font in posts, its just distracting.

 

[JR23]

Whats most important is that the fan is well suited to the controller, while a 4-pin fan will plug into a 3-pin voltage controller and run at lower voltages no problem it kind of defeats the purpose. Also a 3-pin fan running on a PWM controller will either result in it permanently being at 12v or in some cases where the +12v is pulsed they can click which is quite odd and definitely again defeats the purpose of having a good controller. Although it has to be said sometimes everything will get along perfectly, PWM fans are far better at being controlled in that manner as that's what they are built for.

I find that PWM fans connected to a PWM controller will provide a wider operating range, I used to run Corsair PWM fans that went fron 650-2200RPM. In addition the controller doesn't have to dissipate lots of heat like when trying to control the voltage output. PWM fans are typically more expensive but can be a little more versatile. For example on a H100i where you want the fans to idle low and then spin their nuts off when performance is demanded PWM fans are perfect but for chassis fans it's perhaps far less significant.


So in short I would say it really depends how wide of an operating range you need the fans to deliver, if you just want to get quiet case fans and run them between 1100 and 1400 for example probably go 3 pin but if you already have a 4-pin PWM controller integrated into the motherboard and you desire a big operating range then pay the premium for 4-pin. Some motherboards/controllers can switch between voltage control and PWM control so don't be fooled by the fact 4-pins means it's permanently PWM.

JR