Supercomputers/Sites/LUMI Data Center, Kajaani
Kajaani · Finland
LUMI Data Center, Kajaani
Operated by CSC. Hosting 3 systems in this dataset, 2 of them currently operational.
- Systems hosted
- 3
- Installed Rmax
- 379.7 PFlop/s
- Recorded power
- 7.11 MW
- Cooling
- Direct liquid cooling, warm water
all eras, as reported
where disclosed
Facility facts
Power, cooling and efficiency figures for LUMI Data Center, Kajaani, each with its own source and date.
| Fact | Value | As of | Basis | Source |
|---|---|---|---|---|
| Renewable share of supply | 100 percent LUMI page states its energy consumption is covered by 100 percent renewable electricity; page undated, fetched 2026. | 2025 | Operator stated | lumi-supercomputer.eu |
| Facility power | 230 MW Site electrical infrastructure ready for up to 230 MW, with a national grid connection offering more; this is site capacity, not LUMI draw. | 2025 | Operator stated | lumi-supercomputer.eu |
| PUE | 1.24 CSC article of 2023-04-25: PUE 1.24 with excess-heat utilisation and 1.04 without it; heat-pump energy raises the figure when heat is reused. Averaging period not stated. | 2023-04 | Operator stated | csc.fi |
| Heat reuse | Excess heat feeds Kajaani district heating, covering about 20 percent of the city's annual district heat and offsetting about 12,400 tonnes CO2 per year LUMI page also states excess heat warms hundreds of households in Kajaani. | 2023-04 | Operator stated | csc.filumi-supercomputer.eu |
| Renewable share of supply | 100 percent CSC states LUMI runs on 100% carbon-free hydroelectric energy | 2022-11 | Operator stated | csc.fi |
| Heat reuse | Waste heat reused for about 20% of Kajaani district heating EuroHPC release gives the 20% figure; CSC article says waste heat can warm nearby homes | 2020-10 | Operator stated | eurohpc-ju.europa.eucsc.fi |
Systems at this site
| System | Rmax | Power | First operational | Status |
|---|---|---|---|---|
| Roihu | - | - | 2026-06 | operational |
| LUMI | 379.7 PFlop/s | 7.11 MW | 2022-06 | upgraded |
| LUMI-AI | - | - | - | planned |
Facility fields are recorded only where a public source states them. Blank means we have not found one, not that the value is zero: an important distinction if you are aggregating power or PUE across sites.