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 fuelled sales expansions at rivals such as Nvidia Corp. As PC sales have stagnated, Intel has increasingly been depending on its sales to data centres, which provide behind-the-scenes computing power for mobile and web-based apps. Those apps, in turn, rely on artificial intelligence for features like photo and speech recognition.