Nvidia did not warn at least some major customers in advance about new U.S. export rules it was told about a week ago requiring it to obtain licenses to sell its China-focused artificial intelligence chip,

Nvidia said it would record a $5.5 billion charge on its quarterly earnings and disclosed that the U.S. will now require a license for exporting the company's H20 processors to China and other countries.

President Donald Trump’s administration has barred Nvidia Corp. from selling its H20 chip to China, an escalation of Washington’s tech battle with Beijing that will cost the company billions of dollars and hamstring a product line it explicitly designed to comply with previous US curbs.