(Reuters) -Nvidia on Wednesday forecast a roughly threefold surge in quarterly revenue that handily beat estimates as the company banked on towering demand for its industry-leading artificial-intelligence chips, sending its shares up 10% after-hours. The already-hefty demand for the company's data center chips and graphics processing units (GPUs) continues to grow as firms scramble to expand their AI offerings. Nvidia's silicon dominates the global market for AI chips, where it counts the likes of Microsoft among its customers.