I read a review of the Asus Rog Strix B450-F Gaming motherboard with power consumption between 40 and 166W using a GTX 1060 Strix 6GB GPU (TDP 130W) and a Ryzen 5 2600X CPU (65 - 102W). What else contributes to the power draw and if I swapped in a Ryzen 5 3400G which draws 45 - 65W would the draw drop about 130W?
The CPU and GPU are generally large contributors to the draw.
The motherboard itself has a draw.
All the drives draw.
All the fans draw.
Anything connected to the USB ports also draws.
Plus any lights or anything like that have to be added.
That's about all I can think of at the moment.