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The United States has widened restrictions on Nvidia artificial intelligence chip exports beyond China to select Middle Eastern countries.

Nvidia, one of the world's most valuable businesses with a market capitalization of US$1.2 trillion.

It claimed in a regulatory filing this week that the limits affected its A100 and H100 processors, which are used to speed machine-learning activities.

The measures, according to the company, would not have an "immediate material impact" on its performance. 

It did not specify which Middle Eastern nations were affected by these limitations.