Sachin Katti, a former Intel executive who spent much of his career in academia, is now helping guide OpenAI’s infrastructure efforts. Photographer: Kyle Grillot/BloombergFor months, OpenAI’s Sam Altman has been talking up plans to spend trillions of dollars on an unprecedented buildout of data centers stocked with advanced chips to power AI.The task of turning that ambition into a reality now falls in part on Sachin Katti, a recent hire at OpenAI who spent much of his career in academia and lik...