Microsoft builds the world’s most powerful AI data centre in Wisconsin

US tech giant, Microsoft, is completing the construction of Fairwater in Mount Pleasant, Wisconsin, which it says will be the world’s most powerful AI data centre. The facility is expected to be operational in early 2026 after a $3.3 billion investment, with an additional $4 billion now committed for a second site.

The company says the project will help shape the next generation of AI by training frontier models with hundreds of thousands of NVIDIA GPUs, offering ten times the performance of today’s fastest supercomputers.

Beyond technology, Microsoft is highlighting the impact on local jobs and skills. Thousands of construction workers have been employed during the build, while the site is expected to support around 500 full-time roles when the first phase opens, rising to 800 once the second is complete.

The US giant has also launched Wisconsin’s first Datacentre Academy with Gateway Technical College to prepare students for careers in the digital economy.

Microsoft is also stressing its sustainability measures. The data centre will rely on a closed-loop liquid cooling system and outside air to minimise water use, while all fossil-fuel power consumed will be matched with carbon-free energy.

A new 250 MW solar farm is under construction in Portage County to support the commitment. The company has partnered with local organisations to restore prairie and wetland habitats, further embedding the project into the surrounding community.

Executives say the development represents more than just an investment in AI. It signals a long-term commitment to Wisconsin’s economy, education, and environment.

From broadband expansion to innovation labs, the company aims to ensure the benefits of AI extend to local businesses, students, and residents instead of remaining concentrated in global hubs.

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