NEW YORK/SAN FRANCISCO :Alphabet's growth-stage venture arm CapitalG and Nvidia are in talks to invest in artificial intelligence infrastructure provider Vast Data in a new funding round that could value the startup as high as $30 billion, two sources said. The startup is raising several billion dollars from tech giants, private equity and venture capital investors, which could make it one of the most valuable AI startups, the two sources with knowledge of the matter said, as companies building