Supercomputers/Systems/Voyager-EUS2
USA · operational · mixed
Voyager-EUS2
Also known as Azure ND96amsr A100 v4 cluster
Operated by Microsoft at Microsoft Azure (undisclosed US region) .
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
- 30.05 PFlop/s
- Rpeak
- 39.53 PFlop/s
- Rmax ÷ Rpeak
- 76.0%
- Cores
- 253,440
- 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 | - Microsoft Azure ND96amsr_A100_v4 cluster | Microsoft | - | Reported | top500.org |
| Accelerator | NVIDIA A100 SXM4 80GB Accelerators NVIDIA A100 80GB, eight per ND96amsr_A100_v4 node | NVIDIA | - | Reported | top500.orglearn.microsoft.com |
| CPU | AMD EPYC 7V12 CPUs x86-64 · 48C · 2.45 GHz · 7 nm AMD EPYC 7V12 48C 2.45GHz | AMD | - | Reported | top500.orglearn.microsoft.com |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox HDR InfiniBand, 200 Gb/s per GPU | NVIDIA | - | Reported | top500.orglearn.microsoft.com |
| Operating system | Ubuntu Server Operating systems Linux distribution · Open source, free with paid support tiers Operating System: Ubuntu 18.04 LTS | Canonical | - | Reported | top500.org |
The read
Microsoft Azure's NDm A100 v4 cluster, built from ND96amsr_A100_v4 nodes. Microsoft Learn lists eight 80 GB A100 GPUs and 96 AMD EPYC 7V12 vCPUs per VM with a dedicated 200 Gb/s HDR InfiniBand link per GPU. It entered the TOP500 in November 2021 at rank 10 with 30.05 PFlop/s Rmax and was still listed at rank 78 in June 2026. The EUS2 suffix suggests Azure East US 2, but neither TOP500 nor Microsoft names a datacentre for the entry, so the site is left undisclosed as for Eagle. Power draw is not published.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-09 Added Voyager-EUS2 (Microsoft Azure)
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 |
|---|---|---|
| learn.microsoft.com | does not name this system | NVIDIA A100 SXM4 80GB, AMD EPYC 7V12, NVIDIA InfiniBand HDR |
| top500.org | names system and part | NVIDIA A100 SXM4 80GB, AMD EPYC 7V12, NVIDIA InfiniBand HDR, Ubuntu Server |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Inside a node
Why accelerators exist, what the memory hierarchy costs, and how the CPU and accelerator merged onto one package.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.
Programming a supercomputer
The software stack beneath the application, and why the OS is now a sovereignty signal as much as a technical choice.