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Supercomputers: China’s Tianhe-2 still No. 1, ORNL’s Titan stays No. 2

Posted at 3:17 am July 17, 2015
By Oak Ridge Today Staff Leave a Comment

Jeff Nichols and Titan at ORNL

Jeff Nichols, associate director for computing and computational sciences at Oak Ridge National Laboratory, in front of Titan, which was the world’s fastest supercomputer in November 2012 but is now ranked No. 2. (Photos courtesy of ORNL/File photo October 2013)

 

For the fifth consecutive time, Tianhe-2, a supercomputer developed by China’s National University of Defense Technology, has retained its position as the world’s number one system, according to the 45th edition of the twice-yearly TOP500 list of the world’s most powerful supercomputers. Tianhe-2, which means Milky Way-2, led the list with a performance of 33.86 petaflop/s (or quadrillions of calculations per second) on the Linpack benchmark.

At number two was Titan, a Cray XK7 system installed at the U.S. Department of Energy’s Oak Ridge National Laboratory. Titan, the top system in the United States and one of the most energy-efficient systems on the list, achieved 17.59 petaflop/s on the Linpack benchmark.

The only new entry in the Top 10 supercomputers on the latest list is at number seven—Shaheen II is a Cray XC40 system installed at King Abdullah University of Science and Technology, or KAUST, in Saudi Arabia. Shaheen II achieved 5.536 petaflop/s on the Linpack benchmark, making it the highest-ranked Middle East system in the 22-year history of the list and the first to crack the Top 10. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: Asia, China, Cray Inc., Cray XC40, Cray XK7, Europe, Frankfurt, IBM, Intel, International Supercomputing Conference, Japan, KAUST, King Abdullah University of Science and Technology, Lenovo, Linpack benchmark, Milky Way-2, National University of Defense Technology, NVIDIA, Oak Ridge National Laboratory, ORNL, Saudi Arabia, Shaheen II, supercomputers, Titan, Top500, U.S. Department of Energy, United States

Cray re-soldering Titan’s connectors, supercomputer testing could be done in April

Posted at 1:55 pm March 13, 2013
By John Huotari 11 Comments

Jeff Nichols and Titan at ORNL

Jeff Nichols, associate director for computing and computational sciences at Oak Ridge National Laboratory, in front of Titan, the world’s fastest supercomputer. (Photos courtesy of ORNL)

Hundreds of connectors are being re-soldered each week, and the Titan supercomputer at Oak Ridge National Laboratory—the world’s fastest machine—could be in regular production by May, a lab official said Wednesday.

Jeff Nichols, ORNL associate lab director for computing and computational sciences, said connectors on the $100 million computer’s motherboards had too much gold, and solder was interacting with the gold on connector pins, making the solder unstable and leading to cracks.

There are about 20,000 of the pencil-sized connectors, which link central and graphic processing units, or CPUs and GPUs. Each connector has about 100 pins.

[Read more…]

Filed Under: Oak Ridge National Laboratory, Science, Top Stories Tagged With: acceptance testing, blades, cabinets, connectors, CPU, Cray Inc., Cray XK7, gold, GPU, Jeff Nichols, motherboards, Oak Ridge National Laboratory, ORNL, petaflops, solder, supercomputer, Titan

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