Elon Musk plans 660K GB300 GPUs for Colossus 2 by year-end

Elon Musk wants to pack 660,000 NVIDIA GB300 GPUs into his Colossus 2 AI training cluster by late December. If that number sounds absurd, consider that the facility already houses roughly 330,000 B300 GPUs and 110,000 B200 GPUs, making it the largest AI data center on Earth by IT power consumption. The planned expansion would bring the Memphis complex’s total GPU count well past the half-million mark for Blackwell-series chips alone. In raw compute terms, the facility is projected to reach approximately 1.825 million H100-equivalent units. What Colossus 2 looks like today The current installation is already staggering. With its existing 440,000 GPUs (combining B300 and B200 variants), Colossus 2 generates about 1.112 million H100-equivalent compute units. Powering all of this requires 946 megawatts of IT power. The capital cost so far sits at an estimated $35.8 billion, according to projections from Epoch AI. The full buildout, once the additional GPUs are installed and operational, is modeled at approximately $58 billion. xAI, operating under the designation SpaceXAI for this project, isn’t keeping the facility to itself either. Leasing agreements reportedly include Anthropic runn...