The 54-year-old hailing from Taiwan's ancient capital, Tainan, may not be a household name like many of her Silicon Valley peers. But after a near-decade-long tenure at the helm of Advanced Micro Devices (AMD), Su's quiet rise to the top bracket of America's tech industry is starting to get some long-overdue attention. The CEO of the Santa Clara tech giant, which supplies GPU chips to companies seeking computing power for AI applications, became one of the newest entrants to Forbes' annual billionaire list published this week.