Intel Corp on Wednesday said it sold $1 billion of artificial intelligence processor chips in 2017, the first time the world’s second-largest chipmaker disclosed revenue from the fast-growing computing segment that has fueled sales expansions at rivals such as Nvidia Corp. As PC sales have stagnated, Intel has increasingly been depending on its sales to data centers, which provide behind-the-scenes computing power for mobile and web-based apps. At an event for Wall Street analysts at Intel’s Santa Clara, California headquarters to explain its strategy, Navin Shenoy, its data center chief, said the company has been able to modify its CPUs to become more than 200 times better at artificial intelligence training over the past several years.