Japan reclaims top ranking on latest TOP500 list of world’s supercomputers

June 20, 2011

The K computer (credit: RIKEN)

A Japanese supercomputer capable of performing more than 8 quadrillion calculations per second (8 petaflop/s) is the new number one system in the world, according to the latest edition of the TOP500 List of the world’s top supercomputers. The system, called the K Computer, is at the RIKEN Advanced Institute for Computational Science (AICS) in Kobe.

Bumped to second place after capturing No. 1 on the previous list is the Tianhe-1A supercomputer the National Supercomputing Center in Tianjin, China, with a performance at 2.6 petaflop/s. Also moving down a notch was Jaguar, a Cray supercomputer at the U.S. Department of Energy’s (DOE’s) Oak Ridge National Laboratory, at No. 3 with 1.75 petaflop/s.

The K Computer, built by Fujitsu, currently combines 68544 SPARC64 VIIIfx CPUs, each with eight cores, for a total of 548,352 cores—almost twice as many as any other system in the TOP500. The K Computer is also one of the most energy-efficient systems on the list.

The new TOP500 List was released Monday, June 20, at the 2011 International Supercomputing Conference in Hamburg.