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The efficiency
Even when renewably sourced , efficient use of power is critical to cost and sustainability . Providers compete to offer lowest Power Usage Efficiency ( PUE ) possible . The global industry average of 1.6 means most businesses are paying a 60 % premium on all power consumed by IT hardware , while the most efficient and best designed data centres can offer PUE as low as 1.2 ( 20 %). Reducing consumption is also important for avoiding excessive burden on local supply .
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