DeepCool FH-04 Fan Hub, Supports up to 4 Fans (3-pin Non-PWM or 4-pin PWM), Occupying only One 4-pin Motherboard Header | DP-FH04PWM-HUB

If non-PWM fans are connected to this fan hub, this fan hub CANNOT give them extra PWM function. They will run at full speed.

If PWM fans are connected to this fan hub, speed of all PWM fans can be adjusted at the same time. That is, all PWM fans will run at the same DUTY RATIO, not the same speed. Only speed of Fan 1 can be identified by the system.