Existing Devices HID PSU: Signals the device to enter automatic/zero-RPM mode when the control is disabled in Fan Control. (#274) Removes the 50% default fan speed. The default is now automatic/zero-RPM mode. (#274) Flex PSU: Signals the device to enter automatic/zero-RPM mode when the control is disabled in Fan Control. (#274) Removes the 50% default fan speed. The default is now automatic/zero-RPM mode. (#274)