By Stephen Nellis (Reuters) – Nvidia Corp on Tuesday announced new flagship chips for video gamers that use artificial intelligence (AI) to enhance graphics, saying it has tapped Taiwan Semiconductor Manufacturing Co to make the processors. Nvidia has gained attention in recent years with its booming data center business, which sells chips used in artificial intelligence work such as natural language processing. But the company’s roots are in graphics chips, which still provided 59% of its $26.9 billion in revenue in its most recent fiscal year. In a streamed online keynote address, Nvidia Chi…