{"id":"dee2544a-dedc-4d29-9109-1e969a496373","slug":"nebius-mantsala","name":"Nebius Mäntsälä Data Center","aliases":[],"locationId":"b5f05b0b-6878-45de-9b98-610721565fa7","lat":null,"lng":null,"locationPrecision":null,"landStatus":null,"lifecycleState":"partially_energized","powerSourceMix":"grid","interconnectionQueueStatus":null,"interconnectionQueueId":null,"expectedEnergizationDate":null,"dedicatedSubstation":null,"gridOperator":"other","waterSourceNotes":"Free cooling; heat-recovery system recovers ~20,000 MWh/yr, heating equivalent of ~2,500 Finnish homes","servingUtility":null,"acreage":null,"totalBuildingSqft":null,"streetAddress":null,"notes":"Nebius's operational Mäntsälä facility is being tripled from about 25 MW to 75 MW to host up to 60,000 GPUs (NVIDIA H100/H200 and Blackwell). It runs at a PUE as low as 1.1 with a heat-recovery system feeding local district heating.","keyFacts":[{"label":"Expansion target (company)","value":"Oct 8 2024 Nebius announced it would triple capacity at its Mäntsälä, Finland data center to 75 MW, enabling up to 60,000 GPUs at that location alone, with stated annual revenue potential over USD 1 billion at full utilization ([Nebius, Oct 8 2024](https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw))","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"},{"label":"GPU roadmap (company)","value":"Expansion includes NVIDIA H200 (customer availability from Nov 2024 per the release) alongside installed H100s, with Nebius saying it would be among the first in Europe to bring NVIDIA Blackwell to customers in 2025 ([Nebius, Oct 8 2024](https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw))","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"},{"label":"Efficiency / heat recovery (company)","value":"Company cites PUE as low as 1.1 under high IT loads, free cooling, and heat recovery of about 20,000 MWh annually (heating equivalent of about 2,500 Finnish homes), with operations at server temperatures up to 40C ([Nebius, Oct 8 2024](https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw))","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"},{"label":"ISEG supercomputer (company)","value":"Mäntsälä hosts ISEG, cited at 35.26 GFlops per watt-second and ranked in the top 25 supercomputers globally by energy efficiency in the company release ([Nebius, Oct 8 2024](https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw))","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"},{"label":"Europe investment program (company)","value":"Expansion framed as part of Nebius investing more than USD 1 billion in AI infrastructure in Europe by mid-2025, including build-to-suit greenfield sites and colocations ([Nebius, Oct 8 2024](https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw))","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"}],"reviewStatus":"reviewed","sources":[{"url":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","title":"Nebius to triple capacity at Finland data center to 75 MW"},{"url":"https://www.datacenter-forum.com/datacenter-forum/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","title":"Nebius to triple capacity at Finland data center to 75 MW"},{"url":"https://www.datacenterdynamics.com/en/news/nebius-to-triple-capacity-of-mantsala-data-center-in-finland/","title":"Nebius to triple capacity of Mäntsälä data center in Finland","publisher":"Data Center Dynamics"}],"reviewNote":null,"createdAt":"2026-08-19T00:49:38.116Z","updatedAt":"2026-09-28T08:30:04.058Z","location":{"id":"b5f05b0b-6878-45de-9b98-610721565fa7","name":"Mäntsälä","slug":"mantsala-uusimaa","kind":"city","parentLocationId":"b8f7d99e-79e2-4250-af3a-a46c46cba899","region":null,"lat":null,"lng":null,"reviewStatus":"reviewed","aliases":[],"collisionRisk":"high","reviewNote":null,"createdAt":"2026-08-19T00:49:37.733Z","updatedAt":"2026-08-21T03:20:12.226Z"},"parties":[{"id":"212ba279-14cf-466c-9a27-79910f9b9f7d","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","companyId":"a9609061-00fd-4d9b-9b2d-ce2d772ab825","externalName":null,"role":"chip_supplier","structureNotes":"H100/H200 and Blackwell GPUs","createdAt":"2026-08-19T00:49:43.056Z","company":{"id":"a9609061-00fd-4d9b-9b2d-ce2d772ab825","name":"NVIDIA","slug":"nvidia"}},{"id":"f2ef899c-205b-4d81-bb02-121f04512a7e","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","companyId":"9f66cf6b-6c81-44f0-ae30-5f0082b43342","externalName":"Nebius","role":"developer","structureNotes":"AI cloud company (Nasdaq: NBIS); developer and operator","createdAt":"2026-08-19T00:49:41.864Z","company":{"id":"9f66cf6b-6c81-44f0-ae30-5f0082b43342","name":"Nebius","slug":"nebius"}}],"capacityClaims":[{"id":"6d565f5b-2dba-4089-98c0-926a09f89e22","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","series":"announced","valueGw":0.075,"asOf":"2024-10-01T00:00:00.000Z","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"press_release","evidenceTier":"claimed","supersedesId":null,"note":"Tripling target to 75 MW","createdAt":"2026-08-19T00:49:40.088Z"},{"id":"cdb4b8b9-90fb-4bdf-8cdb-ddef4be89d56","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","series":"energized","valueGw":0.025,"asOf":"2024-06-01T00:00:00.000Z","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"press_release","evidenceTier":"reported","supersedesId":null,"note":"Existing operational capacity prior to expansion (~25 MW implied)","createdAt":"2026-08-19T00:49:39.239Z"}],"financialClaims":[{"id":"8f69f28c-4382-45dd-a03d-e28f4e581eb0","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","kind":"capex","label":"European AI infrastructure program (not Mäntsälä-specific)","valueUsd":"1000000000","capUsd":null,"conditions":"More than USD 1B across Europe by mid-2025; not site-specific","asOf":"2025-06-01T00:00:00.000Z","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"company_filing","evidenceTier":"reported","createdAt":"2026-08-19T01:32:36.798Z"}],"metricClaims":[{"id":"b2d8d76a-fee3-46e0-9618-472a8d5d2778","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","metricType":"cooling_type","valueNumeric":null,"valueText":"liquid cooling with heat recovery (~20,000 MWh/yr); PUE ~1.1","unit":null,"grantingJurisdiction":null,"asOf":"2024-06-01T00:00:00.000Z","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"press_release","evidenceTier":"claimed","supersedesId":null,"note":null,"createdAt":"2026-08-19T00:49:41.091Z"},{"id":"4b24c76d-d427-4a00-a737-3bd0c03e5a5b","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","metricType":"gpu_count","valueNumeric":60000,"valueText":"up to 60,000 GPUs (H100/H200/Blackwell)","unit":null,"grantingJurisdiction":null,"asOf":"2024-06-01T00:00:00.000Z","sourceUrl":"https://www.datacenter-forum.com/datacenter-forum/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"journalist_report","evidenceTier":"reported","supersedesId":null,"note":null,"createdAt":"2026-08-19T00:49:40.708Z"},{"id":"3d569334-e06a-4e12-b66a-0fabd443bfd8","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","metricType":"gpu_count","valueNumeric":60000,"valueText":"Up to 60,000 GPUs (NVIDIA H100/H200, Blackwell)","unit":null,"grantingJurisdiction":null,"asOf":"2024-06-01T00:00:00.000Z","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw","sourceType":"company_filing","evidenceTier":"verified","supersedesId":null,"note":null,"createdAt":"2026-08-19T01:32:37.554Z"}],"powerProjects":[],"facilities":[],"incidents":[],"events":[{"id":"cc1c7fbe-1fd4-4fda-9569-13cbbdcdfcc8","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"party_linked","series":null,"oldValue":null,"newValue":null,"claimId":null,"detail":"developer: linked externalName \"Nebius\" to company nebius","occurredAt":"2026-08-31T01:15:19.281Z","createdAt":"2026-08-31T01:15:19.281Z"},{"id":"c29b6d53-c884-4769-8efd-5f5c5c26dfaf","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"financial_recorded","series":null,"oldValue":null,"newValue":null,"claimId":null,"detail":"capex: European AI infrastructure program (not Mäntsälä-specific)","occurredAt":"2026-08-19T01:32:37.175Z","createdAt":"2026-08-19T01:32:37.175Z"},{"id":"d1330020-84e4-419b-a1d7-260436fe8839","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"party_added","series":null,"oldValue":null,"newValue":null,"claimId":null,"detail":"chip_supplier: a9609061-00fd-4d9b-9b2d-ce2d772ab825","occurredAt":"2026-08-19T00:49:43.451Z","createdAt":"2026-08-19T00:49:43.451Z"},{"id":"54c23536-4d1b-4d25-8c2d-7f0cd5520932","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"party_added","series":null,"oldValue":null,"newValue":null,"claimId":null,"detail":"developer: Nebius","occurredAt":"2026-08-19T00:49:42.268Z","createdAt":"2026-08-19T00:49:42.268Z"},{"id":"28fd2ec6-6d4b-4810-aab1-9218bb1e43ed","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"capacity_changed","series":"announced","oldValue":null,"newValue":"0.075","claimId":"6d565f5b-2dba-4089-98c0-926a09f89e22","detail":null,"occurredAt":"2026-08-19T00:49:40.401Z","createdAt":"2026-08-19T00:49:40.401Z"},{"id":"53e53f33-6062-448d-a706-3da7435befef","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"claim_recorded","series":"announced","oldValue":null,"newValue":"0.075","claimId":"6d565f5b-2dba-4089-98c0-926a09f89e22","detail":"claimed · press_release","occurredAt":"2026-08-19T00:49:40.247Z","createdAt":"2026-08-19T00:49:40.247Z"},{"id":"5538003e-52a4-4150-8d47-1b40e5c06451","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"capacity_changed","series":"energized","oldValue":null,"newValue":"0.025","claimId":"cdb4b8b9-90fb-4bdf-8cdb-ddef4be89d56","detail":null,"occurredAt":"2026-08-19T00:49:39.554Z","createdAt":"2026-08-19T00:49:39.554Z"},{"id":"a08ac5e5-9b20-4f60-8005-ebbb5d9bda34","dataCenterId":"dee2544a-dedc-4d29-9109-1e969a496373","eventType":"claim_recorded","series":"energized","oldValue":null,"newValue":"0.025","claimId":"cdb4b8b9-90fb-4bdf-8cdb-ddef4be89d56","detail":"reported · press_release","occurredAt":"2026-08-19T00:49:39.403Z","createdAt":"2026-08-19T00:49:39.403Z"}],"capacity_picture":{"announced_gw":0.075,"contracted_gw":null,"under_construction_gw":null,"energized_gw":0.025,"announced_minus_energized_gw":0.049999999999999996,"by_series":{"announced":{"valueGw":0.075,"asOf":"2024-10-01T00:00:00.000Z","evidenceTier":"claimed","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"},"contracted":null,"under_construction":null,"energized":{"valueGw":0.025,"asOf":"2024-06-01T00:00:00.000Z","evidenceTier":"reported","sourceUrl":"https://nebius.com/newsroom/nebius-to-triple-capacity-at-finland-data-center-to-75-mw"}}},"jsonLd":{"@context":"https://schema.org","@type":"Place","name":"Nebius Mäntsälä Data Center","url":"https://registry.deploy.report/datacenters/nebius-mantsala","address":{"@type":"PostalAddress","addressLocality":"Mäntsälä"}}}