Microsoft Fairwater Wisconsin

Compute capacity

445.7K H100e

IT power

369 MW

Capital cost

$14B

Microsoft Fairwater Wisconsin is an AI data center operated by Microsoft, located in the United States (4800 90th St, Mount Pleasant, WI 53403). Its compute is used by OpenAI, Microsoft.

The site holds roughly 445,680 H100-equivalents of AI compute. It draws about 369 MW of power. Building and equipping it represents an estimated $14B of capital in 2025 dollars. It currently runs B200.

Power is supplied through WE Energies. These figures are modelled estimates, not disclosures: Epoch AI derives them from permits, satellite imagery and reported spending, with an uncertainty of roughly 1.4x to 1.6x depending on the metric.

Timeline

Compute (H100e): 0 (2023-07-14) → 4.5M (2028-05-13)

Full record

Owner: Microsoft
Ownership confidence: Confident
Users: OpenAI (likely), Microsoft (likely)
Project: Microsoft AI WAN #confident
Country: United States
Location: 4800 90th St, Mount Pleasant, WI 53403
H100 equivalents: 445,680
Power: 369 MW
Total capital cost: $14B
Current chips: B200
All chips: B200
Energy suppliers: WE Energies