Supercomputers/Systems/Unaizah-4
Saudi Arabia · operational · hpc
Unaizah-4
Operated by Saudi Aramco .
Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- 4.42 PFlop/s
- Rpeak
- 10.95 PFlop/s
- Rmax ÷ Rpeak
- 40.4%
- Cores
- 23,680
- Power
- -
- Per watt
- - GF/W
Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.
What this machine is made of
One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.
| Role | Part | Supplier at build | Quantity | Confidence | Source |
|---|---|---|---|---|---|
| Integrator | - Dell PowerEdge XE8640 | Dell Technologies | - | Reported | top500.org |
| Accelerator | NVIDIA H100 SXM5 Accelerators CUDA (Hopper GH100) · 16,896C · 1.98 GHz · TSMC 4N · 700 W NVIDIA HGX H100 | NVIDIA | - | Reported | top500.org |
| CPU | Intel Xeon Platinum 8462Y+ CPUs x86-64 · 32C · 2.8 GHz · Intel 7 Intel Xeon Platinum 8462Y+ 32C 2.8GHz | Intel | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Infiniband HDR | NVIDIA | - | Reported | top500.org |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription RHEL | Red Hat | - | Reported | top500.org |
The read
A Saudi Aramco Dell PowerEdge XE8640 GPU system with Intel Xeon Platinum 8462Y+ 32-core CPUs and NVIDIA HGX H100 GPUs on HDR InfiniBand, running RHEL, installed in 2024. It debuted at 225th on the November 2024 TOP500 and was 322nd by June 2026, with 23,680 cores, Rmax 4.42 and Rpeak 10.95 PFlop/s. It is the smaller sibling of Tuwaiq-1, already in this dataset, with the same node type. The site is not stated in a page we fetched, so the system is left unlocated, and no operator source was fetched, so every figure rests on TOP500 alone and the tier is reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-02 Added Unaizah-4, Saudi Aramco's H100 Dell system, 225th on the November 2024 TOP500
Source check
We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.
| Cited source | Result | Found on the page |
|---|---|---|
| top500.org | names system and part | Intel Xeon Platinum 8462Y+, NVIDIA H100 SXM5, NVIDIA InfiniBand HDR |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.