The U.S. supercomputer Frontier was crowned the world’s speediest this year, but some computer scientists say China‘s Tianhe-3 may be as fast. WSJ unpacks the tech and design of the machines as the two countries race to solve some of the world’s biggest challenges.

Photo illustration: Sharon Shi

U.S. vs. China
This original video series explores the rivalry between the two superpowers’ competing efforts to develop the technologies that are reshaping our world.

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