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Yeah, I know - sorry for being unclear. What I meant was that the 2100T will get pretty close to Zacate in daily use and provide much better performance per watt, which is why I think it's an acceptable rival (except in terms of price!). Surely a more efficient Zacate board would only save about 5W?
I have seen the review you link to, but it doesn't include the low-power i3 (unless I'm missing it).
Do these overclock?