The DOJ subpoenaed Nvidia in its antitrust probe into the chipmaker.Officials are investigating whether Nvidia's success hurts buyers who want to use other providers.A spokesperson for Nvidia declined to comment on the matter. Sign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read preview Thanks for signing up! Go to newsletter preferences Thanks for signing up! Access your favorite topics in a personalized feed while you're on the go. ...