The ATOM PC uses 1/3 power of Intel Core Duo

http://www.vr-zone.com got its hands on a configuration of the ATOM desktop using a processor and the motherboard that accompanies it. If the site does not speak the performance achieved with this CPU running at 1.6 GHz, it has nonetheless measured its overall power consumption, and it is very low.
The machine has consumed only 39W, despite the use of a 3.5" hard disk at 7200 RPM and a 5.25" burner. An Intel Core2 Duo E6400 draws between 87 and 164W (see tomshardware:truth-pc-power-consumption).
While we should not expect a great performance, this type of machine could find its place largely among many individuals or companies that only use office applications and the Internet. Such a choice, on a large scale would be beneficial for the control of global warming.