Titan, a Cray XK7 system installed at Oak Ridge, Tennessee, overtook the former number-one Sequoia to take first place in the latest World's Top 500 Supercomputers, in rankings released by Top500.org on Monday.

With a calculation speed of 17.59 quadrillions per second, Titan outmatched Sequoia, whose speed achieved 16.32 quadrillions calculations per second, and Fujitsu's K computer with its speed of 10.51 quadrillions calculations per second.

Among the world's top 500 supercomputers, China has 72 supercomputing systems, four more top supercomputers since June of this year.

China's Tianhe-1A system installed at the National Supercomputing Center in Tianjin dropped from first place in 2010 to eighth place, while another Chinese system, Nebulae, dropped out of the top 10 and ranked 12th overall.

The World's Top 500 Supercomputer list, released twice a year by Top500.org, is considered among the most influential of supercomputer rankings around the world.

   DARPA Trial Subset, United Sates

 Cores: 63360

Rmax (TFlop/s): 1515.0 

Rpeak (TFlop/s): 1944.4

Power (kW): 3576

Efficiency (%): 77.92

Year: 2012

Manufacturer: IBM

Site: IBM Development Engineering