Depends upon the generation of Atom honestly. Older Atoms had extremely inefficient chipsets paired with them despite the processors having some varying power d

Depends upon the generation of Atom honestly. Older Atoms had extremely inefficient chipsets paired with them despite the processors having some varying power draw, but the CPU on those only took somewhere between some mW up to several watts which were eclipsed by the rest of the system typically (the chipsets drew at least 11 w idle or load last I remember). I had one of the older Ion 2 Atom 330 boxes that were popular for media center PCs and it didn't really matter if it was made by nVidia either - power draw was pretty much the same no matter what.