Here is the Asus FAQ on the subject, "[Motherboard] AURA Software - How many adjustable LEDs can I control?".
Aura can control adjustable LED strips consisting of up to 120 independant LEDs for each adjustable LED header.
https://www.asus.com/us/support/FAQ/1036380
There is a whole section of the FAQs designated to Aura software & lighting.
https://www.asus.com/us/Motherboards/ROG-STRIX-Z370-F-GAMING/HelpDesk/
But apart from the lighting the power should be about the same as any other LED PC fan (which is about 2-3 fans per header).