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SilverStone fan hub
The SilverStone octoport PWM hub (part number SST-CPF04-USA) features 8 4-pin Molex fan outputs, one 4-pin Molex fan input (for PWM control), and is powered via a connected SATA adapter. Speed control via voltage is not available for 3-pin fans, though they can be connected to the device (and will run at maximum speed). The SATA power is required; no fans will run if only the 4-port connector is hooked up (indeed, there are only two wires running to the four-pin connector).
The unit can report fan speed using the one glossy header (underneath the "SilverStone" logo, on the far right). A four-pin fan must be connected to this header for speed to be reported, and only this fan's RPM will be reported.
![Only one header can be used to report speed.](/dankwiki/images/thumb/4/40/Silverstone.webp/300px-Silverstone.webp.png)
The SATA cable is 300mm, while the PWM cable is 500mm. Since the unit is drawing 12V power from a SATA cable, the three pins indicate a maximum input of 4.5A (54W). This allows an average of 0.5625A per header if all eight are populated. I'm not sure of the maximum output of a given header; 1A would be a reasonable lower bound. The input is brought through a 2200µF capacitor.