petaflop

China has topped the list of the twice-annual ranking of the world's most powerful supercomputers, replacing the United States. In the latest ranking the Tianjin National Supercomputer Center's Tianhe-1A system benchmarked a performance of 2.67 petaflops (quadrillion floating-point calculations per second), surpassing the former top achiever, the U.S. Department of Energy (DOE) Oak Ridge Leadership Computing Facility's Cray XT5 Jaguar system, which clocked in at 1.75 petaflops in this round.