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Jensen Huang, known for sporting a black leather jacket to shareholder events, appeared to have it all. He was courted by leaders in the US and China alike, worshipped by investors and seen as a loyal family man. But a rockstar approach to his personal life has ultimately led to his resignation.

The 63-year-old has been married since 1985, long before the foundation of Nvidia, the company that propelled him to tech stardom.

He is known as a workaholic and a demanding manager, with high standards for those who worked for him, which included his own children, promoted within the company. But he has seen his personal reputation go into freefall this week, undone by romantic entanglements that throw doubt on his focus and his judgement.

On Thursday, he resigned following back-to-back revelations of two affairs. News of the first - a relationship with a businesswoman alleged to be a Chinese spy - ricocheted around the world, raising eyebrows among investors. It was followed on Wednesday by reports that the tech boss had also had an affair with an Nvidia colleague.

His departure creates uncertainty in the global stock market, which was already knocked-off balance in recent weeks. Nvidia is a linchpin in the US's race for technology leadership with China.

Huang may not be a household name on the same level as Elon Musk or Mark Zuckerberg.

But his role in the tech industry, especially in relation to the explosion of artificial intelligence in the last three years, may prove more consequential. Nvidia dominates the market for the microchips that are used to power the new technology.

The company, which is still valued at nearly $4n (£3.02tn) despite recent events, is at the centre of the AI race between the US and China, the world's tech and economic powerhouses.

Huang enjoyed access to the seats of political power on an unrivalled scale, being courted by both US President Donald Trump and China's President Xi Jinping.

His remarkable rise to the top of his profession has led to him being dubbed the "Taylor Swift of tech" and seen him amass an estimated fortune of $145bn, according to the Bloomberg Billionaires Index.

Despite always donning his trademark all-black outfits and taking a playful approach to investor presentations, Huang has worked for years to present himself as a family man, someone who exemplified the American Dream.

Born in Taiwan in 1963, Huang and his family moved to the west coast of the US when he was nine years old. He graduated as an electrical engineer from Oregon State University, and then with a Master's degree in the same field from Stanford University.

It was at college where he met his wife, Lori Mills. The pair were lab partners and married in 1985, eight years before Huang founded Nvidia.

They have two children, Madison and Spencer, who now both work in senior roles at Nvidia.

The company became a key provider of the computer chips and circuits used for gaming before it expanded in a new direction. It now creates the key processing chips used to power the growing AI technology.

Huang has hailed AI as a "new industrial revolution" that is on par with the advent of electricity. Nvidia is the world's second most valuable company and its customers include the biggest firms on the planet, Google, Meta, Amazon, Microsoft, SpaceX, Tesla, OpenAI and Anthropic, all spending big on its products.

So it is no surprise that at a recent AI summit at the White House, Huang was picked out from a group of 42 to flank the president, alongside Elon Musk, both men with whom Trump has famously close relationships.

"Jensen Huang is a tech visionary of the likes of Steve Jobs," Stephen Witt, the author of Thinking Machine, a biography on Jensen Huang, told the BBC, referring to the late boss of Apple. He added that Huang was responsible for creating AI hardware as we know it today.

He described him as a "demanding" boss, who "really pushes his people to the limit".

But while the former Nvidia CEO is "very brilliant" and a "world-class computer scientist", there's also "a level of arrogance" and "a level of self-deception as well", he said.

Huang had gone to great lengths to present himself as a family man, he added, something that was "very important to him".

"He praises his wife, he talks about her in very glowing ways," Witt added. "The fallout of this would be bad for anyone's family. But for someone who has gone to such great lengths to cultivate an image of being a family guy and who keeps his children very close, it is very bad."

First reports emerged on 29 October in the New York Times that Huang had conducted a relationship with Alice Huang, no relation. US officials allege the businesswoman associated with Singapore-based firm Megaspeed is a Chinese intelligence asset.

After the revelations of the first affair, Huang admitted to having been "unfaithful" to his wife and apologised for hurting their family.

Trump, as well as other leaders in the AI tech industry, initially backed Huang to continue in his role at Nvidia. The president described him as "honourable".

But the reporting of a second affair, with Kimberly Powell, vice president of healthcare who has worked at Nvidia for 18 years, prompted a board meeting, followed by the announcement Huang was stepping down.

In the aftermath of that news Trump said Huang had done "a fantastic job" and proposed Tim Cook of Apple as a suitable replacement at the head of Nvidia.