With just one 4-pin M.B. header, the DeepCool FH-10 Integrated Fan Hub can power up to ten fans (3-pin Non-PWM or 4-pin PWM): With the help of the integrated fan hub product FH-10, ten fans (three or four pin) can be powered while only taking up one 4-pin motherboard header, which can be used as a CPU or system fan. This fan hub is unable to provide additional PWM functionality to non-PWM fans that are connected to it.