How China built world's fastest computer without US chips

China has built the world's fastest supercomputer, capable of making 93 quadrillion calculations a second. And for the first time, it's entirely powered by Chinese-made processors, following a US ban on exporting chips for devices suspected to be used for nuclear research. The Sunway TaihuLight supercomputer, which is located at the state-funded Chinese Supercomputing Center in Wuxi, a city near Shanghai in eastern China, is more than twice as powerful as previous record-holder Tianhe-2, according to TOP500, a research organization that ranks the powerful computers twice a year. The milestone comes a year after the United States barred exports of computer chips to China for use in its supercomputers, citing concerns that the machines had been used in "nuclear explosive activities." In turn, by ramping up development of its own chips, China has come to surpass the US' own achievements in supercomputing: the top-placing American creation, the Department of Energy's Titan, secured third place ranking on TOP500's list, below China's two-record breaking supercomputers. "It's not based on an existing architecture.