In this articleAMDNVDALisa Su, CEO of AMD, left, and Jensen Huang, CEO of NvidiaBenoit Tessier | Ritzau Scanpix | Mads Claus Rasmussen | ReutersIn the 1990s, when Intel dominated the PC chip market, the semiconductor maker needed Advanced Micro Devices to exist as a viable No. 2 to help avoid being charged with monopolistic behavior. Almost three decades later, AMD may be serving a similar role for Nvidia, which controls over 90% of the market for graphics processing units used for artificial intelligence w ...