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.
https://support.apple.com/en-us/103253
E.g., Apple M2 Pro chip, 32GB unified memory, 8TB SSD.
What is your source? Because, according to the link shared by op, they can consume up to 50W or 100W depending on the model.
Also notably there are some low power options too. My first kube cluster was on these nice 2014 Acer Chromebox cxi's; they idled at 6w! Crazy slow 2957u Celeron processor, but I used it a node as my desktop for ~2 years (with 16GB ram). But it had gobs of USB bandwidth, mpcie wifi, sata, gigabit, and if i'd sprung for i3 models it probably would have been downright pleasant to use versus the 1.6GHz no turbo dual core I was getting.
Personally I've avoided the atom cores generally, but there's been a variety of decent low power offerings of big cores for a while. Heck, my Ultrabook tablet is ~6W when running, with screen on, with a i5-7200u. 15W TDP core with some additional TDP up available.
Point is, there's been a range of pretty low power x86 offerings. Just, not always super obvious.