Whose data centers are more efficient? Facebook’s or Google’s?

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Google is a total champ when it comes to its infrastructure, and a blog post Monday shows the search giant is running its data centers at a power usage effectiveness (PUE) of 1.14. The PUE metric is a measure of how much extra power is required to provide each unit of compute. So, in Google’s case, its data centers only use 14 percent more power for everything that isn’t the servers.  But wait, is that right? Google later in the post claims that the version of PUE that gives it the 1.14 ranking is more comprehensive than others tends to use. Google tosses in power lost to AC/DC conversions, cooling offices associated with the data center and other bits and pieces. more...