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Last fall, Google posted information about the efficiency of their data centers and said that they would update this information roughly every quarter. They have now collected data for the 4th quarter of last year and published them.

For tracking purposes, they have been keeping records on the efficiency of any Google data center with an IT load of at least five mega-watts and a time-in-operation of at least six months.

In the fourth quarter, Google’s average power and cooling overhead in these facilities was 16 percent, bringing the overhead for the trailing 12 months to 19 percent.  That figure was at 21 percent in the third quarter, so clearly at least SOME progress is being made.

It’s a lot of technical mumbo-jumbo for sure, but for comparison’s sake, a recent Environmental Protection Agency report put the overhead of the average enterprise data center at 100% (or higher).

Google is at least trying to be a greener company, which is respectable.  It will be interesting to see how these figure progress as the weather warms up over the spring-time, as that is when most efficiency ratios explode.

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