Elon Musk’s artificial intelligence company xAI is building what could soon be the largest data center in the world, and it is doing so at record speed.
In March, xAI purchased a 1 million-square-foot warehouse in Memphis to serve as the site of its second major AI training cluster, dubbed Colossus 2. Just six months later, the facility has already reached 200 megawatts of power capacity, with resources in place to scale beyond 1 gigawatt this quarter, according to analytics firm SemiAnalysis.
That level of computing capacity would surpass large-scale AI clusters built by Meta, Anthropic, and other competitors. The timeline is equally notable: where similar projects by Oracle, Crusoe, and OpenAI took around 15 months to deploy, Colossus 2 reached its current capacity in less than half that time.
Speed to Market as Strategy
Rapid development has become a hallmark of xAI’s infrastructure approach. The company’s first Memphis facility, Colossus, reached 300 MW of capacity in only 122 days after repurposing a former Electrolux factory. It remains the world’s largest fully operational AI training cluster.
Power Controversies
To achieve such accelerated buildouts, xAI has leaned on unconventional power sourcing — drawing scrutiny from regulators and environmental groups.
In May, the Southern Environmental Law Center alleged that xAI was operating 35 natural gas turbines at its Colossus site, despite being permitted for only 15. The group argued the unpermitted equipment amounted to a violation of the Clean Air Act, sparking lawsuits and concern among local residents over air quality.
In July, xAI sidestepped mounting opposition in Tennessee by acquiring a former Duke Energy power plant in Southaven, Mississippi, just six miles from the Colossus 2 site. Mississippi regulators approved the use of gas turbines for one year without a permit. The 114-acre facility now operates seven turbines with 245 MW of capacity, and SemiAnalysis says it could eventually support more than a gigawatt.
To scale further, xAI is expected to partner with turbine rental firms such as Solaris Energy Infrastructure. Capital expenditures for Colossus 2 are projected in the tens of billions of dollars, though the company still needs to raise funding to secure the full allocation of Nvidia GPUs earmarked for the project. SemiAnalysis expects those GPUs to be fully deployed by early 2026.
The AI Infrastructure Race
xAI is not alone in building next-generation data centers at historic scale. Microsoft announced Thursday that its new 315-acre campus in Mount Pleasant, Wisconsin, is nearing completion. The $3.3 billion project spans more than 1 million square feet across three data centers and will deploy hundreds of thousands of Nvidia GPUs, which the company says will deliver 10 times the performance of today’s fastest supercomputers.
With Colossus 2, Musk’s firm has positioned Memphis as a central hub in the escalating competition to build the largest and most advanced AI training infrastructure in the world.
