U.S. President Donald Trump on Wednesday imposed a 25% tariff on certain artificial intelligence chips, including Nvidia’s H200 processor and a comparable high-end chip from AMD, the MI325X, under a new national security proclamation issued by the White House.

The measure follows a nine-month investigation conducted under Section232 of the Trade Expansion Act of1962, which allows the administration to impose trade restrictions on imports deemed a threat to national security.

The order targets a range of advanced semiconductors that meet specific performance thresholds, as well as electronic devices containing those chips, subjecting them to new import duties.

The White House said the action is part of a broader strategy to encourage chipmakers to expand manufacturing in the United States and reduce dependence on overseas suppliers, particularly in regions such as Taiwan that dominate global chip production.

The tariffs add to a growing list of trade and industrial policies aimed at reshaping the semiconductor supply chain amid rising geopolitical and technological competition.