Half the electricity in a PC is wasted according to Intel, Google

[techpr]

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.

More... (http://digg.com/tech_news/Half_the_electricity_in_a_PC_is_wasted_according_t o_Intel_Google)