New figures published on the DatacenterDynamics site suggest that PUE ratings are on the move. And the PUE is going down. The modal PUE rating has moved year-on-year below 2.00 to lie within the 1.85-1.90 range by 2009 as shown in the diagram below of DatacenterDynamics. But you also can see we are still wasting a lot of energy in the data centers. This are rough figures, we should be aware that measurement of PUE still is not standardized.