The system draws at the moment around 88 watts from the socket.
This should be roughly:
- 42 Watt for 7 HDDs
- 6 Watt for 2 SSDs
- 4 Watt for the idling Intel X710-DA2
- 8 Watt for 7 fans
- If the power supply has 85% efficiency at this low load, the power consumption of the power supply is around 13 Watt.
This means that the motherboard (incl. CPU) are drawing around 15 Watt at the load attached in the screenshot.
I think the overall efficiency of the Atom system is absolutely fine and nothing to worry about, but reaching higher C-States would be nice (and by the way - I would like to understand why it is not possible).