India, Nov. 13 -- Investors have rushed to back Nvidia's rivals after Jensen Huang resigned as its chief executive, but the contest to be the main supplier for the AI industry involves different chips, and some of the strongest challengers are big technology companies building processors for their own data centres.

Shares of AMD and Broadcom rose in premarket trading on Thursday, Reuters reported, as investors bet the turmoil at Nvidia - after reports emerged of Huang's affair with a woman that US officials believe was spying for China - could help them win business.

The turmoil did not end with Huang's resignation. Later the same day that Nvidia named finance chief Colette Kress as interim chief executive, another report said Huang had...