So any proper Hub will send back only ONE fan's speed, and the speed signals from all the other fans will be ignored entirely, never to be seen or known. So, a Hub for case fans REALLY should be plugged into the CHA_FAN or SYS_FAN header.Īny mobo fan header can accept the speed signal sent back to it from only ONE fan. The CHA_FAN or SYS_FAN header uses a different temp sensor on the mobo to guide its case ventilation fans. The CPU_FAN header is guided by a sensor inside the CPU chip so its fan will respond to CPU cooling needs. The major difference between these is the TEMPERATURE sensor each uses for guidance. The mobo will have at least TWO fan headers: one for the CPU cooler, and another for case ventilation.

So it makes sense to ensure that the Hub used gets its PWM signal from the header that is designed for case ventilation fans. I presume that OP is concerned about using six fans all for case ventilation. Similarly, all the ARGB lighting units will get exactly the same signals and do the same thing. Most certainly, all the fan motors will receive the SAME signals IF all those fans are identical, they will operate identically. So each section has its own signal input from the appropriate mobo header, and the entire unit uses one common source of power from a SATA power output from the PSU. The other is the Hub for ARGB LIGHTS in the fan frames. But further, that device is really TWO Hubs in one box, for very different and independent purposes. Certainly the applies to the Hub you linked to by Cooler Master. I'll add a couple comments re the last paragraph above.ĪLL means of connecting several fans to a single fan header (Splitters or Hubs) pick up ONE speed control signal from that header and provide that to ALL fans on that device.

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