Project record, campus
xAI Colossus supercomputer (Memphis, Tennessee)
xAI runs its Colossus supercomputer in Memphis. The Greater Memphis Chamber said in December 2024 that it would grow to more than 1 million GPUs. xAI says it paid USD 35 million for a 150 MW substation to serve the facility from the local utility MLGW. Total facility MW is not published. xAI says it will invest another USD 20 million in a second substation and is building an USD 80 million water recycling plant.
Reported figures
| Figure | What it measures | Delivery state | Scope and date | Used in totals | Source |
|---|---|---|---|---|---|
| 150 MW Official source | Grid connection Substation rating for one grid connection. Not total facility load Source wording: "150MW substation" | not disclosed Stage stated in source: Operating | campus date not given, seen 19 Oct 2026 | No. Marked not summable by research: Substation rating for one grid connection. Not total facility load | x.ai (opens in a new tab) |
Each figure is shown as reported, with its own definition. IT, facility, grid and thermal figures are never added together. Capacity definitions.
Power and grid
150 MW substation built by xAI for supply from MLGW, according to xAI. x.ai (opens in a new tab)
Sources (2), last checked 19 Oct 2026
- xAI Memphis Announces Expansion Of Supercomputer with Addition Of Tech Companies In Digital Delta (opens in a new tab), Greater Memphis Chamber, published 4 Dec 2024, accessed 19 Oct 2026
- Information Center: Memphis (opens in a new tab), xAI (SpaceXSI), accessed 19 Oct 2026
Last checked 19 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.