Largest GPU clusters in the world

By installed GPUs that a company has put on record, xAI’s Colossus 1 in Memphis leads with over 220,000 NVIDIA GPUs on more than 300 MW (Anthropic, 6 May 2026). SpaceX’s S-1 describes 440,000 GB200 and GB300 GPUs across Colossus 2’s clusters and next expansion, and Microsoft says its Fairwater Wisconsin campus holds hundreds of thousands of NVIDIA GPUs. By plan, Meta’s Prometheus in New Albany, Ohio targets about 1 million GPUs, with hundreds of thousands running today.

Argonne’s Aurora has the most of any public supercomputer in this list, with 63,744 Intel Data Center GPU Max GPUs. Lawrence Livermore’s El Capitan follows with 46,080 AMD MI300A accelerators and Oak Ridge’s Frontier with 39,424 AMD MI250X packages. JUPITER at Jülich runs around 24,000 NVIDIA GH200 superchips.

Colossus 1 has over 220,000 NVIDIA GPUs and more than 300 MW, all of which Anthropic agreed in May 2026 to use. Tom’s Hardware reports a mix of 150,000 H100, 50,000 H200 and 30,000 GB200 for it. For Colossus 2, SpaceX’s S-1 describes about 110,000 GB200 and 110,000 GB300 in its first two clusters plus at least 220,000 more GB300, 440,000 in all, which the table carries as planned. Press reports of 550,000 are unconfirmed, and Epoch AI estimates 946 MW of IT load in service.

Every row carries one of four statuses. Operational means the operator or a primary source says it is running. Partly operational means a phase is live and more is coming, as at Stargate Abilene (6 of 8 buildings delivered). Under construction and announced cover clusters that are contracted or built but not yet confirmed live. Planned GPU counts sit in their own column and never add to the installed count.

The installed count is physical GPUs: nodes times GPUs per node when the operator publishes both. MI250X boards count once, not as two dies, and an MI300A APU counts as one GPU. H100-equivalents and design limits are never counted as GPUs. When an owner publishes no installed total, as with Fairwater, Tesla Cortex and DeepL Mercury, the cell stays empty and the note column carries what the source does say.