US tech giant Nvidia has opened an independent investigation following reports its CEO Jensen Huang had a relationship with a suspected Chinese spy.

Axar.az reports, citing BBC, Nvidia, one of the most valuable companies in the world, said its board had no reason to believe the company's secrets or national security were compromised, adding that the CEO was committed to continuing to lead the organisation.

Separately, Jensen Huang admitted to having been "unfaithful" to his wife and apologised for hurting her and their children.

US intelligence officials believed that Chinese businesswoman Alice Huang, who had a close relationship with Jensen Huang, was a spy for Beijing, according to a New York Times report.

Jensen Huang said he took "full responsibility" for what he did, adding that he had fallen short of his responsibilities to Nvidia's employees, board and shareholders.

Nvidia is one of the world's largest companies and seen as central to making the hardware for emerging AI technologies, and Jensen Huang has been in charge of it for more than 30 years.