Microsoft is one of the world's largest companies and unsurprisingly that's thanks in part of a healthy level of self-promotion. Microsoft's self-image is certainly a rosy one that at times as produced almost comical comments, such as when Microsoft CEO Steve Ballmer welcomed Google's new Android OS to "Microsoft's world", apparently referring to the phone OS market, despite the fact the Symbian had vastly more market share.
So when Google gave an unprecedented inside peek inside its efforts to green its servers and offered up some hard numbers in the form of Power Usage Effectiveness (PUE) metrics, Microsoft couldn't resist the chance to try one-up its competitor with its own server efforts.
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