Atom Power consumption vs wallmart special
I just finished building a system similar to the wallmart special. I based it on a PC2500G MB with a sata nb drive, and an 80W picoPSU. It draws 23watts at idle as measured at the outlet with a P3 kill-a-watt.
From what I have read about the atom--it should destroy the via cX stuff in power/watt. But it doesn't quite do it yet because it is only offered with the 945gc chipset at the moment--which is a dog power wise (24W TDP + 3W TDP for ICH7). So you have a chip with 4W TDP soldered to a MB with 27W TDP. Admitedly TDP does not equal idle power, which IMHO is the most important power measurement--but based on the discussions above and elsewhere seems to be acceptable to use for comparison purposes.
http://www.heise-online.co.uk/news/Intel-introduces-the-Atom-230-and-Atom-N270--/110855
Evidently if you are OEM you have access to better chipsets--but we are left with just the 945GC at the moment which kind of defeats the purpose of the low power cpu.
http://www.mydigitallife.info/2008/...atom-centrino-based-ktus15-mini-itx-platform/
BTW my ancient dell dimension XPS R400 (400 MHz PII) with 378mb RAM and an ancient 10GB HD idles at 28W according to the P3, and so far it has run PIAF fine.
One more BTW on the subject of power consumption. a fully decked out AMD system with the 780G chipset, and e4850 dual core idles near 50W--which is amazing considering the integrated graphics. I mention it because that chipset-which includes the HD3450 integrated graphics has an idle power of less than a watt.
http://www.legitreviews.com/article/676/12/
http://www.codinghorror.com/blog/archives/001107.html
Another thought: By the time the atom can compete with via Cx on idle power the via nano will be here. Who knows what that will bring. Probably not reduced idle power since it is designed as a drop in replacement for the c7-d and that chip is not being retired.
At this point it is about chipsets--we need better ones. AMD has indicated that they are going to compete with Atom as well. Clearly they have the best chipsets at the moment--so if they can get geodes revenge or whatever it will be called out with a 55nm chipset it may be the platform of choice. I bet Intel will get their chipsets in order by then though.
Lets hope diamondville gets out soon with a <1W chipset
sorry for the long post--thought all this info would be usefull for power discussions.