I can't measure values below 10W myself, but with 2 SSDs and 8GB RAM it never goes above that value, even under full load.
[0] https://github.com/R3NE07/Futro-S740/blob/main/power_consump...
The nice thing about n100 Is its ability to disable the iGPU in the bios, saving you a little bit of power. But you have to reset the bios on the board to regain any output if you might need it later.
It is great that something on par is so affordable & even lower power though! And what I bought was a value because it was used, where-as now you can buy new. It's felt like the atom lineup was kind of slow rolling things & there hasnt been much availability for cheap AMD systems. These low price low power e-cores systems have really changed the game, have expanded the value proposition a lot versus the used-x86 mini PC or io limited ARM market's long stalemate.