Project record, campus
Nebius Mäntsälä data centre (first site)
Nebius runs its own AI data centre at Mäntsälä in southern Finland. In October 2024 it announced it would triple the site to 75 MW, with room for up to 60,000 GPUs at this location alone. Nebius says the site runs at a PUE as low as 1.1 under high IT loads and recovers about 20,000 MWh of heat a year, equal to heating 2,500 Finnish homes. The expansion added NVIDIA H200 GPUs to the installed H100 fleet.
Reported figures
| Figure | What it measures | Delivery state | Scope and date | Used in totals | Source |
|---|---|---|---|---|---|
| 75 MW Official source | Otherbasis unclear Site capacity after expansion. MW basis not stated Source wording: "triple capacity at Finland data center to 75 MW" | Planned Stage stated in source: Planned | campus 8 Oct 2024 | No. Basis unclear (not stated as IT, facility, grid or thermal). Never summed. | nebius.com (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.
Sources (1), last checked 19 Oct 2026
- Nebius to triple capacity at Finland data center to 75 MW (opens in a new tab), Nebius, published 8 Oct 2024, accessed 19 Oct 2026
Last checked 19 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.