In 2008, IBM's Roadrunner was the first computer to exceed one petaFLOPS (see Roadrunner). In 2010, China's Tianhe-1A supercomputer claimed the top speed with 2.4 petaFLOPS. Meaning "Milky Way ...

(Mashable) -- The United States no longer owns the world's fastest supercomputer. A computer called Tianhe-1A, unveiled on Wednesday at a conference in Beijing, China, can run calculations faster ...

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.