ISEG2 node architecture
ISEG2 is operated by Nebius in Netherlands. This profile covers Ranked system / partition. Specifications are listed below; anything the operator has not published is itemised in the documented-fields list.
Published benchmark (TOP500 · June 2026)
- HPL rank
- #15
- HPL Rmax
- 202.4 PFlop/s
- Theoretical peak Rpeak
- 338.49 PFlop/s
- Ranked core count
- 718,848
- Measured power
- 5300 kW
- Energy efficiency
- 38.19 GFlop/s per watt
Cluster · Nebius NB-D-SR-IESH6 · public profile
- Operator / site
- Nebius
- Country
- Netherlands
- Profile scope
- Ranked system / partition
- Data checked
- 14 September 2026
- Manufacturer
- Nebius AI
- Ranked core count
- 718848
- Theoretical peak (PFlop/s)
- 338.49
- Measured power (kW)
- 5300
- Energy efficiency (GFlop/s per watt)
- 38.18867924528302
- Operating system
- Ubuntu 22.04
Nebius NB-D-SR-IESH6 · public profile
- System / node model
- Nebius NB-D-SR-IESH6
- CPU model
- Xeon Platinum 8468 48C 2.1GHz
- Cores per socket
- 48
- Accelerator model
- NVIDIA H200 SXM5 141 GB
- Accelerator memory
- 141 GB per accelerator
Scope and uncertainty
Nebius names ISEG2 only for its rankings and publishes no hardware page for it. Its H200 platform documentation describes a purchasable product rather than this cluster, so it is not used as a source for these fields.
Documented fields: 11 / 27
Every field this catalog checks. Fields listed above have a value; the remainder are shown here. A field marked absent is not publicly available in the sources we could verify, which does not mean the hardware is missing. Fields that cannot apply, such as benchmark results for an unranked system, are excluded from the total.
Cluster — 6 / 7
- ✓Manufacturer
- ✓Ranked core count
- ✓Theoretical peak (PFlop/s)
- ✓Measured power (kW)
- ✓Energy efficiency (GFlop/s per watt)
- ✓Operating system
- ✕Network topology
Nebius NB-D-SR-IESH6 · public profile — 5 / 20
- ✓System / node model
- ✕Compute nodes of this type
- ✓CPU model
- ✕CPU sockets per node
- ✓Cores per socket
- ✕Physical CPU cores
- ✕CPU note
- ✓Accelerator model
- ✕Physical accelerators per node
- ✕Host / unified memory
- ✓Accelerator memory
- –Accelerator ↔ accelerator link
- –On-node fabric
- ✕CPU ↔ accelerator link
- ✕Network interfaces per node
- ✕Interface model
- ✕Interface speed
- ✕Interface-to-accelerator topology
- –Aggregate scale-out per node
- ✕GPUDirect RDMA
- ✕Management / storage networking
- ✕Local storage
- –NVMe data disks
- –Max remote data disks
- –Uncached disk IOPS
- –Uncached disk throughput (MBps)
- ✕Form factor
Sources
Browse all cluster architecture pages →
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