A Chinese supercomputer — the Dawning Nebulae, based at the National Supercomputing Center in Shenzhen, China — has achieved a sustained computing speed of 1.27 petaflops (quadrillion mathematical operations per second), ranking as the world’s second fastest machine on the latest Top 500 list of supercomputers released Monday.

The world’s fastest computer remains the Cray Jaguar supercomputer, based at the Oak Ridge National Laboratory in Tennessee, at 1.75 petaflops.