IBM has delivered a supercomputer cooled by hot water to the Swiss Federal Institute of Technology Zurich (ETH Zurich), which IBM says marks “a new era in energy-aware computing.” The Aquasar cooling system uses water at temperatures of up to 140 degrees, and as a result consumes up to 40 percent less energy than a comparable air-cooled machine. The system also uses waste heat to provide warmth to university buildings, reducing Aquasar’s carbon footprint even further.