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Pictured above: water-cooling at IBM's Poughkeepsie datacentre.
The green datacentre is a working facility, processing jobs for IBM customers and Big Blue itself.
Three years ago, the facility was running out of space and suffered cooling problems. Rather than build a new centre, IBM called in a team of designers to remodel the space, and in the process created a showroom highlighting datacentre best practice.
Some of the measures it took are startlingly low-fi: brushes around pipes, for example, stop air escaping; bendy underfloor pipes mean the water-cooling configuration can be changed at any time; and the air vents in the floor are different sizes for the air-cooled side and the water-cooled side, according to which needs more ventilation.
In the back room, there's a sub-station that allows DC electricity to go straight into the equipment without conversion. "There's a lot of discussion in industry: why do we need all these conversion paths all the way through: DC to AC, AC to DC?" Schmidt says. Each conversion loses energy along the way, so plugging DC straight into the datacentre avoids that leakage. "We've now certified some of our high-end systems [for DC power]."