Kempner AI Cluster (H200 configuration)
ThinkSystem SD665-N V3 HPC system supplied by Lenovo for Harvard University in the United States. The cited June 2026 TOP500 configuration delivers 19.45 PFLOP/s on HPL.
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.
- 112 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.
- 19.45 1
- Rpeak PFLOP/s Theoretical peak double-precision performance of the listed configuration. This is not AI or mixed-precision throughput.
- 28.68 1
- HPL efficiency % Rmax divided by Rpeak: the share of theoretical peak the system delivered on LINPACK. Computed from the two sourced figures.
- 67.8 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.
- 384 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.
- 50.65 1
- Site Host or operator named by TOP500 for the installation.
- Harvard University 1
- Country Country or region reported by TOP500 for the site.
- United States 1
- City Site city as reported by TOP500 or the operator. It can be the operator address rather than the machine room.
- Holyoke, Massachusetts 3
- Region World region of the installation country (grouping applied by this site).
- Americas 1
- Vendor Manufacturer or system supplier exactly as submitted to TOP500.
- Lenovo 1
- Vendor group Supplier grouped for filtering. Bull is the Eviden/Atos line; Other covers single-system suppliers.
- Lenovo 1
- System model Hardware platform in the cited TOP500 edition.
- ThinkSystem SD665-N V3 1
- Processor CPU description in the cited TOP500 edition; clock and core count refer to the processor model.
- AMD EPYC 9374F 32C 3.85GHz 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.
- 61,568 1
- Installed Installation year reported in the TOP500 system record. Not necessarily the year of production acceptance.
- 2026 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.
- Linux 2
- TOP500 record Link to the TOP500 database record for this exact submission.
- https://www.top500.org/system/180447/ 2
- Configuration note Operator-supported note on partitions or overlapping configurations. Do not add benchmark figures across configurations without checking overlap.
- A separately benchmarked configuration within the Kempner AI cluster; do not add its performance to another configuration without checking overlap. 3
Sources
- TOP500 list, June 2026 accessed 2026-11-11
- TOP500 system record accessed 2026-11-11
- kempnerinstitute.harvard.edu (operator page) accessed 2026-11-11