There was a lot of hype surrounding Nvidia Corp's (NASDAQ:NVDA) fourth-quarter earnings, and the semiconductor giant delivered. Shares are up 15.3% at $777.62 at last check, and earlier hit a record high of$779, after the artificial intelligence (AI) boom drove results higher than analysts expected. Nvidia recorded adjusted earnings of $5.16 per share on revenue of$22.1 billion, and also lifted its revenue outlook for the current quarter.The AI buzz has helped tech stocks to a great year already, and anal ...