The new Top 500 list of the most powerful supercomputers has been released in conjunction with this week's SC09 conference, and there's a change atop the leaderboard. After two years as runner-up, the Jaguar supercomputer located at the Department of Energy’s Oak Ridge Leadership Computing Facility has overtaken the RoadRunner system at Los Alamos labs to claim the top spot.
Jaguar, which was upgraded earlier this year, posted a 1.75 petaflop/s performance speed running the Linpack benchmark. One petaflop/s refers to one quadrillion calculations per second. The Roadrunner system at Los Alamos was the world’s first petaflop supercomputer, but its performance of 1.04 petaflops was down slightly from 1.105 petaflops in June 2009 due to a repartitioning of the system.
See the new Top 500 list for additional details.