Nebius · Mantsala, Uusimaa, Finland

Nebius Mantsala

90MW

The power of 73,000 US homes.

Drawing power since Oct 2024. Projected to reach 196 MW by Dec 2027.

H100-equivalents: 49K
Capital cost: $2.8B
Chips: H100, B300, H200
Users: Microsoft (unconfirmed)

Embed

This site on the globe

<iframe src="https://jesseahawkins.com/buildout/embed/nebius-mantsala/" title="Nebius Mantsala on a globe of the world's largest AI data centers" width="100%" height="480" style="border:0;max-width:100%" loading="lazy"></iframe>

Every site on the globe

<iframe src="https://jesseahawkins.com/buildout/embed/" title="The AI buildout: the world's largest AI data centers on a globe" width="100%" height="600" style="border:0;max-width:100%" loading="lazy"></iframe>

Each frame credits Epoch AI and links back to its page. Preview it.

Cite

This page

Jesse Hawkins, “Nebius Mantsala · The AI buildout”, jesseahawkins.com, data retrieved 22 Oct 2026. https://jesseahawkins.com/buildout/nebius-mantsala/. Data: Epoch AI, “AI data centers”, CC BY 4.0.

BibTeX

@misc{hawkins2026buildoutnebiusmantsala,
  author = {Hawkins, Jesse},
  title = {{Nebius Mantsala · The AI buildout}},
  year = {2026},
  howpublished = {\url{https://jesseahawkins.com/buildout/nebius-mantsala/}},
  note = {Data: Epoch AI, ``AI data centers'', CC BY 4.0, retrieved 2026-10-22}
}

The data · Epoch AI

Epoch AI, 'AI data centers'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/data/ai-data-centers' [online resource]. CC BY 4.0.

Download

Post on X

Power over time

facility power · 5 milestones

Every milestone

8 Oct 2024 48 MW Nebius announces expansion of Mantsala campus to 75MW.
14 Nov 2025 48 MW Satellite imagery suggests that installation of the cooling units is finalizing on the expansion building. Construction equipment remains around the site. We do not believe the building is operational at this point.
31 Mar 2026 90 MW Nebius announces that the expansion to 75MW is operational at the beginning of 2026.
29 Jun 2026 90 MW All three buildings in the first phase are operational.
31 Dec 2027 · projected 196 MW According to company estimates, the second expansion of 70MW will be complete by the end of 2027.

Every step Epoch planned here on 2 Oct 2026 is still on plan. Planned against reached

Nuclear made 39% of the power in Finland

share of generation · Oct 2025 to Sep 2026

Finland World

Gas 2% against 21% for World
Coal <1% against 33% for World
Other fossil 4% against 3% for World
Nuclear 39% against 9% for World
Wind 26% against 9% for World
Solar 1% against 10% for World
Hydro 15% against 14% for World
Bio & other 12% against 2% for World

Fossil 6% (0 pts on a year earlier) · nuclear 39% · renewables 55% · 74 g CO2e per kWh, life cycle · Oct 2025 to Sep 2026. Generation for all of Finland, without imports; the data does not show which grid feeds the site. Every country behind an AI site.

Sources

selected by Epoch AI

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Mantsala. Grid: Ember, “Monthly Electricity Data and Yearly Electricity Data”, CC BY 4.0, retrieved 11 Oct 2026; shares computed here. All sources.