Cerebras Systems, a Silicon Valley-based startup developing a massive computing chip for artificial intelligence, said on Wednesday that it has raised an additional US$250 million in venture funding, bringing its total to date to US$720 million. The Cerebras chip is about the size of a dinner plate, much larger than the chips it competes against from established firms like Nvidia or Intel. Cerebras has designed the chip and worked closely with its outside manufacturing partner, Taiwan Semiconductor Manufacturing, to solve the technical challenges of such an approach.