US once again boasts the world's fastest supercomputer

The US Department of Energy on Friday unveiled Summit, which can perform 200 quadrillion calculations per second.
Written by Stephanie Condon, Senior Writer
Carlos Jones, ORNL

The US Department of Energy on Friday unveiled Summit, a supercomputer capable of performing 200 quadrillion calculations per second, or 200 petaflops. Its performance should put it at the top of the list of the world's fastest supercomputers, which is currently dominated by China.

Summit, housed at the Oak Ridge National Laboratory (ORNL), was built for AI. IBM designed a new heterogeneous architecture for Summit, which combines IBM POWER9 CPUs with Nvidia GPUs. It has approximately 4,600 nodes, with six Nvidia Volta Tensor Core GPUs per node -- that's more than 27,000.

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The last US supercomputer to top the list of the world's fastest was Titan, in 2012. ORNL, which houses Titan as well, says Summit will deliver more than five times the computational performance of Titan's 18,688 nodes.

Summit will be used for research in a range of fields, including high-energy physics, materials discovery and health care.

"Summit takes GPU accelerated computing to the next level, with more computing power, more memory, an enormous high-performance file system, and fast data paths to tie it all together," James Hack, director of ORNL's National Center for Computational Sciences, said in a statement. "That means researchers will be able to explore more complex phenomena at higher levels of fidelity in less time than with previous generations of supercomputer systems."

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