Microsoft Fairwater Wisconsin
Microsoft designed Fairwater as a single large AI supercomputer for training and inference, supporting Microsoft and OpenAI workloads.
Microsoft Fairwater Wisconsin is a partly operational GPU cluster run by Microsoft in Mount Pleasant, Wisconsin, United States. It runs NVIDIA GPUs; no installed GPU count is published. Live power: 369 MW (Epoch AI estimate), 2,715 MW planned (Epoch AI estimate).
Facts
Source per value- Owner / operator Organization that owns or operates the GPUs. Hosting and facility roles are listed under Partners.
- Microsoft 1
- GPU maker NVIDIA, AMD or Intel, taken from the GPU model.
- NVIDIA 1
- GPU model Accelerator model or family as disclosed. A GH200 is one GPU on a superchip; an MI300A is an APU that contains a GPU.
- NVIDIA GPUs 1
- GPUs installed Physical GPUs in the cluster, from the operator or a deterministic sum of disclosed quantities (nodes × GPUs per node). Planned counts, H100-equivalents and unaudited press totals are never counted here.
- Not published
- GPU count notes What the count covers (one partition, one site, a design limit), qualifiers and competing figures.
- Hundreds of thousands; exact count undisclosed. Single supercomputer; not the global Azure GPU fleet. 1
- Location City, region and country where the cluster sits. Empty when the operator does not name the site.
- Mount Pleasant, Wisconsin, United States 1
- Country Country of the cluster, taken from the location.
- United States 1
- Live power MW Power in service, in megawatts of IT load where the source says so. Company figures are marked in the notes; Epoch AI satellite estimates are labelled as estimates.
- 369 2
- Planned power MW Planned or contracted power at full build, in megawatts.
- 2,715 2
- Power notes Basis and date of the power figures, and who published them.
- Epoch AI estimates 369 MW IT as of 15 May 2026 and about 2.7 GW at full build. Microsoft has not published a campus MW figure. 1
- Status operational = running and named as such by the operator or a primary source; partly operational = a phase is live and more is coming; under construction = building underway; announced = disclosed or contracted with no confirmed go-live.
- partly operational 3
- Operational since Month or year the source gives for the cluster going live (first phase for partly operational clusters). Empty when no date is published.
- 2026-04 3
- Status notes The source’s wording on status, with the date.
- Building 1 operational in April 2026; further buildings are under construction. 1
- Figures as of Date of the source disclosure behind the figures, where the source dates it.
- 2025-09-18 1
Sources
- blogs.microsoft.com accessed 2026-11-11
- Epoch AI estimate: AI data centers dataset accessed 2026-11-11
- Satya Nadella on X: Fairwater building 1 operational accessed 2026-11-11
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