U.S. Adds Export Restrictions to More Chinese Tech Firms Over Security Concerns

The additions included companies that are customers of Intel and Nvidia, and one firm that was the focus of a New York Times investigation last year.

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Nvidia Bets Big on Robots and More

The chipmaker, which has led a rally in artificial intelligence stocks, laid out a vision for dominating so-called physical A.I. Investors appeared impressed.

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Nvidia Rules A.I. Chips, but Amazon and AMD Emerge as Contenders

Amazon, Advanced Micro Devices and several start-ups are beginning to offer credible alternatives to Nvidia’s chips, especially for a phase of A.I. development known as “inferencing.”

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