Usually only a few bytes fit in a USB 2.0 header.
Usually only a few bytes fit in a USB 2.0 header.
You're connecting an NZXT case with RGB lighting and a fan controller, managing three fans and six RGB lights.
SATA provides everything it requires. USB handles just data transfer.
Usb 2.0 header features two rows, with each row dedicated to a single usb port. Typically, the connections in the USB header can support more than 1A of current. With two rows, there are two pins for voltage, two for ground, allowing theoretically more than 2A if the hub utilizes both rows for power. Many fan hubs operate at 5V internally but draw 12V from a SATA or old hdd connector. Consequently, fans and RGB lighting are powered through the additional SATA/Molex port, while internal components consume less than 0.1A by reusing signals from the motherboard to the fans—such as PWM control and software commands for RGB.