I've got 8- or 9-year old C-Series Nano with an APU __ it punk'd the "Atoms" of it's time. I think Anand did an article at the time. Maybe an 8-watt '5200 APU' ??
At 28-watts, those Ryzens can cut that as much as 35- to 40-percent in the wattage department, BUT the one single Zotac I can find...