Nvidia on Wednesday reported a surge in fourth-quarter profit and sales as demand for its specialized Blackwell chips which power artificial intelligence systems continued to grow. For the three months that ended Jan. 26, the tech giant based in Santa Clara, California, posted revenue of $39.3 billion, up 12% from the previous quarter and 78% from one year ago. “Demand for Blackwell is amazing as reasoning AI adds another scaling law — increasing compute for training makes models smarter and increasing compute for long thinking makes the answer smarter,” Nvidia Founder Jensen Huang said in a statement.