America’s new supercomputer beats China’s fastest machine to take the title of world’s most powerful Summit is a stepping stone toward a world of exascale computing. The winner: The US Department of Energy’s Oak Ridge National Laboratory in Tennessee has taken the wraps off Summit, which boasts peak computing power of 200 petaflops, or 200 million billion calculations a second. That makes it a million times faster than your typical laptop. The loser: China. Summit is 60 percent faster than the previous supercomputing leader, the Sunway TaihuLight based in the Chinese city of Wuxi. Consolation prize: China still boasted way...