[SOLVED] About sys fans

[kenzi03]

So i have 6 case fans in total. 2 of them are 3pin fans other 4 are argb. They are all connected to same hub. And hab has pwm connector. I have put that pwm cable in sys fan 2 on my mobo. But i can't see sys2 fans rpm in bios. It obly shows cpu coolers rpm. Why ?

 

[Phaaze88]

I'm probably not the best person to answer this...

The hub should've had a 'main fan' port of sorts that would send and receive PWM signals to and from the motherboard, and the other 4 pin fans would follow this signal as well.
Obviously, this won't happen if you plugged a 3 pin in that port, since they can't send and receive PWM signals.

 

[Paperdoc]

On ALL fan Hubs, there will be ONE output port that can send back to the host mobo header the speed of its fan. All other fans' speeds are ignored completely and you will never "see" them. So, look at the Hub for a specially marked port. (It may be marked for CPU even if you do NOT plug your CPU cooler into it.) You may have NOT plugged a fan in there, so it has NO speed to send back. Connect one of your 4-pin fans to that port.

The most common Hub design can only control the speed of 4-pin fans; any 3-pin fan on such a Hub will always run full speed. There are a few Hubs designed differently with designated different output ports for 3- and 4-pin fans that can control them all. What are your fans doing?