A Cray XT high-performance computing system at the Oak Ridge National Laboratory is the world's fastest supercomputer for science.
The Cray XT, called Jaguar, has a peak performance of 1.64 petaflops, (quadrillion floating point operations, or calculations) per second, incorporating a 1.382 petaflops XT5 and a 266 teraflops XT4 systems.