xAI Colossus / MACROHARDRR Greater Memphis AI Campus

xAI describes Colossus as its gigafactory of compute, built rapidly and doubled to a 200,000 H100 GPU interconnected cluster, with a roadmap to 1 million GPUs. Mississippi state sources announced in January 2026 that xAI is locating the MACROHARDRR data center in Southaven near a newly acquired power-plant site and an existing Tennessee data center. The project represents more than $20 billion of investment, and state sources say the Southaven project will increase xAI's computing power to nearly 2 GW upon completion. Mississippi Development Authority materials include Elon Musk's statement that MACROHARDRR pushes Colossus training compute to about 2 GW.

ADCI keeps 2,000 MW as a regional Greater Memphis/Southaven state/operator-disclosed program capacity target, not current delivered IT load at one facility. The power context remains material and contested: SELC says xAI installed 27 Southaven gas turbines that can generate up to 495 MW for Colossus 2, and AP reported in June 2026 that the Justice Department sought to dismiss a lawsuit alleging unpermitted turbine operation at xAI's Mississippi data-center power plant.