If you do NOT have a USB connection to the motherboard, I believe there is NO way for the aquaero to communicate with the motherboard, or aquasuite.
The aquaero will run the controllers loaded to it, but the controllers cannot be based on data not available to it (e.g. CPU temps).
Your best bet is to control your fans on the delta between water temperature and ambient temperature.
thank you for reply, you are right, I have a misunderstanding of how that function works. without usb connection, it's no way to fetch values unless plug sensors directly on aquaero..