Epoch AI tracks the largest AI data centre in the world by IT power capacity, not raw compute -- and on that measure the record has roughly doubled every 10 months since mid-2024, climbing from Google's 237-megawatt Papillion facility to xAI's Colossus 2, now at 946 megawatts of IT power capacity
Epoch AI tracks the largest AI data centres by IT power capacity rather than raw compute. It finds that the record for the largest AI data centre by IT power has doubled every ten months since mid-2024. Its data series runs from Google's Papillion site at 237 MW in August 2024 to xAI's Colossus 2 at 946 MW.
Verified 2026-09-11
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The biggest AI sites keep growing in power needs, which makes electricity a central part of the race.
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- Epoch AI tracks how much AI compute a dollar buys, measured in constant 2025 dollars across the chips companies actually purchased each quarter. Since 2023, AI chip price-performance has grown 49% a year, doubling every 1.7 years
- Applied Digital had signed long-term hyperscaler leases for 1,410 megawatts of AI data-centre capacity across five campuses as of May 31, 2026, worth approximately $36 billion in contracted revenue over the initial 15-year lease terms 1.41 gigawatts of AI data-centre capacity leased for $36 billion
- Cerebras Systems, the wafer-scale AI chip maker whose cloud inference revenue nearly quadrupled year-over-year, disclosed in its second-quarter 2026 earnings release that it now has 600 MW of data center capacity under contract
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