Roughly 50 percent of the power delivered from a wall socket to a PC never actually performs any work, according to Urs Hölzle, Google fellow and senior vice president of operations. Half the energy gets converted to heat or is dissipated in the AC-to-DC conversion. Around 30 percent of the power delivered to the average server is also lost.
That's why I like small efficient devices. Give me device which consumes 2W of energy total, and which is able to connect to network and do all sorts of cool stuff. Much more efficient than a full blown computer!
-A.
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