ISEG2
ISEG2 is a Nebius AI Cloud GPU cluster housed in Iceland, which Nebius sells as the most powerful commercially available system in Europe for customers renting NVIDIA H200 capacity.
What it runs and how to get time
From the operator- How to get time How researchers or customers get time on the system, naming the allocation programme where the operator states one.
- Rented as commercial cloud capacity through Nebius AI Cloud. 3
- Power design Facility power, energy supply or heat reuse as stated by the operator. Not the benchmark power in the Power column.
- Runs entirely on Icelandic hydroelectric and geothermal power. 4
- Facility Building, data centre or campus that houses the system, as described by the operator.
- Verne Global data centre on a former NATO base, Iceland. 4
Benchmark and hardware
Source per value- Rank Position in the TOP500 edition named in the Edition column. Historic systems keep the rank of the edition where they last appeared.
- 15 1
- Rmax PFLOP/s Measured double-precision LINPACK (HPL) performance of the listed configuration. Older TFLOP/s and GFLOP/s figures are converted to PFLOP/s.
- 202.4 1
- Rpeak PFLOP/s Theoretical peak double-precision performance of the listed configuration. This is not AI or mixed-precision throughput.
- 338.49 1
- HPL efficiency % Rmax divided by Rpeak: the share of theoretical peak the system delivered on LINPACK. Computed from the two sourced figures.
- 59.8 1
- Power kW Power reported for the benchmark run. Measurement boundaries vary by site; this is not facility power, TDP or cooling capacity. Empty when the system does not report it.
- 5,300 1
- Efficiency GFLOP/s per W Rmax per watt of reported benchmark power, computed from the two sourced figures (GFLOP/s per W). Empty when power is not reported.
- 38.19 1
- Site Host or operator named by TOP500 for the installation.
- Nebius 1
- Country Country or region reported by TOP500 for the site.
- Netherlands 1
- Region World region of the installation country (grouping applied by this site).
- Europe 1
- Vendor Manufacturer or system supplier exactly as submitted to TOP500.
- Nebius AI 1
- Vendor group Supplier grouped for filtering. Bull is the Eviden/Atos line; Other covers single-system suppliers.
- Other 1
- System model Hardware platform in the cited TOP500 edition.
- Nebius NB-D-SR-IESH6 1
- Processor CPU description in the cited TOP500 edition; clock and core count refer to the processor model.
- Xeon Platinum 8468 48C 2.1GHz 1
- Accelerator Accelerator model listed for the system. Empty when TOP500 lists none.
- NVIDIA H200 SXM5 141 GB 1
- Accelerator vendor Maker of the accelerator. None listed means TOP500 names no accelerator for the system.
- NVIDIA 1
- Interconnect Network fabric exactly as listed in the cited TOP500 edition.
- Infiniband NDR400 1
- Fabric Interconnect family derived from the listed interconnect (grouping applied by this site).
- InfiniBand 1
- Cores cores Total cores submitted to TOP500, including accelerator cores where TOP500 counts them. Not a CPU-only count and not a CUDA-core count.
- 718,848 1
- Installed Installation year reported in the TOP500 system record. Not necessarily the year of production acceptance.
- 2025 2
- Edition TOP500 edition (YYYY-MM) that supplies the ranking and benchmark data. A historic edition does not assert current operating status.
- 2026-06 1
- OS Operating system from the TOP500 system record.
- Ubuntu 22.04 2
- TOP500 record Link to the TOP500 database record for this exact submission.
- https://www.top500.org/system/180366/ 2
Sources
- TOP500 list, June 2026 accessed 2026-11-11
- TOP500 system record accessed 2026-11-11
- Nebius monthly digest: June 2025 accessed 2026-11-11
- Yandex Co-Founder Volozh's Dutch Tech Firm Unveils Second Supercomputer - The Moscow Times accessed 2026-11-11