How does pwm hub work?

[ThePixelPerson]

Im about to upgrade cases and am deciding between the enthoo pro and pro m acrylic. I like the open style and look of the pro m acrylic but want the pwm hub from the pro. I was wondering how a pwm hub works. Say I have 1 front panel intake fan and 2 radiator fans on the top and my cpu fan, could they ALL be plugged into the hub, and the hub would go.....? To the cpu 4 pin on my mobo? Would I then be able to use a software to control all of them individually? If not could I still control and monitor my cpu fan while the rest are run at the same percentage? Is there a technique to run the fans quieter manually? How do "curves" work to lower rpm? Because with my current setup I tried to configure bios and use software on the case fans and cpu fan but they always end up going back to 100%. I don't really know what I'm doing

 

[techgeek]

Presumably the PWM fan hub would use the PWM signal from the motherboard. I would think for best performance the CPU connector would be the one you'd want as some chassis fan connectors might use temp sensors other than the CPU temp.

Electronically the hub would take the PWM signal and amplify / repeat it to all the available fan connectors. I assume this would be needed to keep from loading down the signal by having many fans connected to it. Power to the hub would be supplied by a SATA or molex connector which would be used to power the hub and all the fans.

To give you more specific information regarding fan control on your motherboard, it would be helpful if we knew what motherboard you have. For instance ASUS has Q-Fan which has 4 predetermined fan profiles, Standard, Silent, Turbo and Full. Then it has a custom fan profile that you can tune to your preference.