Chipmaking giant Nvidia is in talks with Elon Musk about investing in his fast-growing artificial intelligence startup xAI, a source close to the situation said.XAI — which powers the snarky Grok chatbot on Musk’s X social network — is in talks with some investors about raising several billion dollars at a roughly $40 billion valuation, the WSJ reported this week.The Information reported he was talking to strategic investors — meaning tech companies as opposed to investment firms — but didn’t offer any name ...