Nvidia has unveiled a "superchip" for training artificial intelligence models, the most powerful it has ever produced. The US computing firm, which has recently rocketed in value to become the world's third-largest company, has not yet revealed the cost of its new chips, but observers expect a high price tag that will make them accessible to only a few organisations. The chips were announced by Nvidia CEO Jensen Huang at a press conference in San Jose, California on 18 March. He showed off the company's new Blackwell B200 graphics processing units (GPUs), each of which has 208 billion transistors – the tiny switches at the heart of modern computing devices – compared to the 80 billion transistors of Nvidia's current-generation Hopper chips. He also revealed the GB200 Grace Blackwell Superchip, which combines two of the B200 chips.