xAI Unveils US$20bn Mississippi Hyperscale AI Data Centre

Elon Musk's xAI has confirmed plans to invest more than US$20bn in a new hyperscale data centre in Southaven, Mississippi, representing one of the largest single data centre investments announced in the US to date.

The facility will significantly expand xAI's computing capacity and anchor a growing cluster of AI-focused digital infrastructure across the greater Memphis region.

The project will see xAI purchase and retrofit an existing building in Southaven to house the new data centre, known as MACROHARDRR.

Once operational, the site will support nearly 2GW of computing power when combined with the company's nearby assets, positioning it among the most power-dense AI data centre deployments globally.

This infrastructure will enable the continued development of Grok and other AI products across xAI's portfolio, including developer APIs for image generation, voice and agent tools and its xAI For Government suite used by federal, state and local agencies.

The facility is designed to support high-density AI training and inference workloads, reflecting the escalating computational demands of large language models and advanced AI systems.

Co-locating generation and compute infrastructure

The Southaven facility is located close to xAI's newly acquired power plant site and one of its existing data centres in Tennessee, reflecting the company's strategy of pairing large-scale compute with secure access to energy.

The proximity of generation and data centre infrastructure is increasingly critical as AI workloads push power requirements well beyond traditional enterprise or cloud facilities.

"xAI is scaling at an immeasurable pace – we are building our third massive data centre in the greater Memphis area, " says Elon Musk, Chief Executive Officer of xAI.

"MACROHARDRR pushes our Colossus training compute to ~2GW – by far the most powerful AI system on Earth.

"This is insane execution speed by xAI and the state of Mississippi.

"We are grateful to Governor Reeves for his support of building xAI at warp speed."

The technical architecture of the facility prioritises power density and cooling efficiency, both essential for maintaining the performance stability required by AI training clusters operating at this scale.

State incentives and economic impact

The Mississippi Development Authority has approved xAI for its Data Center Incentive, which provides a sales and use tax exemption on computing hardware and equipment software for certified data centres.

The City of Southaven and DeSoto County are also supporting the project through fee-in-lieu agreements.

"Starting off 2026 with a US$20bn investment by xAI is a clear sign Mississippi is not letting up on the economic momentum we have built over the last few years," says Bill Cork, Executive Director of the Mississippi Development Authority.

"Our focus on speed, certainty and readiness allows companies to move quickly and with confidence, while also enabling Mississippi to compete for capital-intensive, advanced technology projects like xAI."

In addition to compute expansion, the investment is expected to generate hundreds of permanent jobs across DeSoto County, spanning technical operations, facilities management and supporting services tied to large-scale data centre operations.

The investment is also expected to generate new tax revenue to support public services in Southaven.

Accelerating US AI infrastructure deployment

"This record-shattering US$20bn investment is an amazing start to what is sure to be another incredible year for economic development in Mississippi," says Governor Tate Reeves.

"Elon Musk is bringing xAI to DeSoto County, a project that will transform the region and bring amazing opportunities to its residents for generations.

"This is the largest economic development project in Mississippi's history."

xAI expects to begin data centre operations at the Southaven site in February 2026, adding a major new node to the rapidly expanding US AI data centre landscape.

The project positions Mississippi within what state officials are calling the 'Digital Delta', a regional cluster of advanced technology infrastructure designed to attract further investment in AI and high-performance computing.