What kind of details? How about 0.25 watt is the power consumption accounting for a 1.16 PUE.
Small, Medium, and Large business sizes were used in the calculation.
Redundancy calculations are made for each business size.
Add all this up accounting for the size of the servers.
And you get the first graphic on the amount of power per user. The biggest gain in energy efficiency is for the small business being 10X more energy efficiency, using 10% of the energy if they chose a gmail solution.
I use Gmail for my e-mail accounts and map domains for my own e-mail dave(at)greenm(dot)com. It is nice to know I am consuming a 1/4 watt per account.