Spectators were important to Huang—when he dressed down an employee, he usually did so in public so that others could learn from the experience. (“Failure must be shared,” Huang said.) If a project was delayed, Huang would command the person responsible to stand up and explain to the audience, in detail, every single thing that had gone wrong.

Huang would then deliver a withering analysis of their performance. Such corporate struggle sessions were not for everyone. “You can kind of see right away who is going to last here, and who is not,” Diercks said. “If someone starts getting defensive, you just know that person won’t be long at Nvidia.”

Diercks believed there was a method to it. “He would never just yell at somebody,” he said. “He would wait for a meeting, with a bunch of people around, so he could make it an educational opportunity for everyone.” But Huang’s criticisms weren’t always constructive—sometimes they were just verbal abuse. One former employee recalled a time when he bungled a minor assignment.

FIVE: Going Parallel

“Kirk and Huang each combined a commanding breadth of technical expertise with a talent for low cunning. As Nvidia succeeded, many of the other graphics start-ups failed. Huang, sensing opportunity, created a master list of competitors on the whiteboard in his office. Then, in consultation with Kirk, he identified the two or three best engineers at each company and began strategizing on how to poach them.

Kirk recalled showing off the Riva 128 to a competitor at a trade show. When the engineer saw what it could do, he gave up on the spot. “I hired him within a few days—and that killed that company, right?” Kirk said. “Because, you know, I removed its brain.” Kirk, mild and professorial, had a predator’s instincts. “We had all the geniuses from all the other start-ups, and as we were successful in overtaking more and more of these little companies, the remaining companies had a harder and harder time staying alive.

Of more than a hundred former and current Nvidia employees I spoke with for this book, almost all had a tender story about Huang to relate. One employee—the same one whom Huang had humiliated in front of dozens of people, asking for a full refund of his salary—told me that when he was later diagnosed with a serious medical issue, Huang offered to pay in full, out of pocket, for his treatment. When Ben Garlick decided to leave Nvidia for a start-up, he was startled to receive an impassioned, personal plea from Huang to stay.

Two fringe strains of computer science, starved of investment, hated—no, detested—by industry and researchers alike had somehow unified to form a thriving, sprawling entity now careering toward sentience. “I just thought, there is no way that Nvidia is this lucky,” Aarts said. “There’s no way that deep learning just fits this perfectly because Nvidia has never put any effort into it!”

Huang called it “luck, founded by vision.”

For Dally, it was Huang’s tireless work ethic that made Nvidia succeed. Even Dally, who left no spare second in his day, could not quite believe the superhuman efforts of his boss. “The rest of us are just here to reduce the bandwidth demands on Jensen,” Dally said. “I mean, when does he sleep?” Diercks agreed: “His hobbies are work, email, and work.”

Plenty of people worked long hours, though. Jens Horstmann attributed Huang’s success to his adaptability. “I’ve often asked myself, how is it that we started in the same cubicle, you know, with a similar IQ, both working equally hard,” Horstmann said. “How is it that this person not only built this amazing company, but also a network around him of people that—that would just die for him if needed?” Huang, Horstmann believed, had changed himself many times. He recalled Huang at LSI, pushing the simulation software to its outer limits. “Now, he’s still doing the same thing, but what he’s engineering is himself. He was not born as a great CEO; he was not destined to be one. He transformed himself into one, just by abstracting! Just by problem-solving the inputs and outputs of what a good CEO should be.

TWENTY-ONE: Jensen

“Jensen contradicted himself frequently, sometimes offering opposing viewpoints within the same interview. He wasn’t playing devil’s advocate, exactly—he just liked to attack ideas from both sides. “He’s not trying to be a politician,” Horstmann said. “He’s not trying to stay on message. He’s trying to process real-time input, and he’s willing to entertain a contradictory thought for a while.” What might appear to be a definitive pronouncement was often just Jensen thinking out loud. Only once he started to repeat himself was it time to pay attention. When an idea really struck Jensen, it slowly built up steam over a period of days or even weeks. It cycled into his vocabulary and was repeated at every meeting. Concepts like the “zero-billion-dollar market” or the “speed of light” hadn’t come to Jensen in a flash; they’d arrived as polished nuggets of wisdom after spending months being tossed in the rock tumbler of his mind. Having arrived, they were then drilled so thoroughly into his employees that his staff sometimes sounded like characters from The Manchurian Candidate, repeating Jensen’s catchphrases verbatim with a glassy look in their eyes. Even employees who hadn’t worked at Nvidia for years could still recite the catechism from memory.