Supercomputers are hungry for power. Titan—the fastest supercomputer in the country—located in Tennessee consumes about 8 megawatts of electricity each year. In return,it solves quadrillions of calculations a moment. Thousands of people employ Titan at the Oak Ridge Leadership Computing Facility and supercomputers at two other DOE Office of Science centers to simulate events that are impossible, impractical, or too dangerous to research any other way—from volcanoes erupting to supernova slamming into a nearby star.
Source: phys.org