While this is nifty, the PUE figure they cite is a ratio of total datacenter energy consumed to total server energy consumed. It's impressive what they have do

While this is nifty, the PUE figure they cite is a ratio of total datacenter energy consumed to total server energy consumed. It's impressive what they have done to reduce the numerator, but it'd also be nice to see what they have done to reduce the denominator (even if that makes the headline PUE number worse in the short term). I remember something from long ago about Google deploying it's own hardware to make the servers themselves more efficient. Anyone seen any updates on this? My google-fu must be weak.