Supercomputers/Systems/Viper-GPU
Germany · operational · hpc
Viper-GPU
Also known as Viper GPU partition
Operated by MPCDF at MPCDF Garching .
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
- 31.10 PFlop/s
- Rpeak
- 44.16 PFlop/s
- Rmax ÷ Rpeak
- 70.4%
- Cores
- 151,200
- Power
- 499.98 kW
- Per watt
- 62.2 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 | - Bull (TOP500 manufacturer) | Eviden | - | Reported | top500.org |
| Accelerator | AMD Instinct MI300A Accelerators ROCm (CDNA 3) · TSMC N5/N6 · 550 W 327 nodes with 2 AMD Instinct MI300A APUs each | AMD | 654 reported | Verified | docs.mpcdf.mpg.detop500.org |
| Interconnect | NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Mellanox/NVIDIA NDR InfiniBand, non-blocking fat-tree, 400 Gb/s per node | NVIDIA | - | Verified | docs.mpcdf.mpg.detop500.org |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Red Hat Enterprise Linux | Red Hat | - | Reported | top500.org |
The read
The GPU partition of the Max Planck Society's Viper supercomputer at MPCDF: 327 nodes with two AMD Instinct MI300A APUs each (654 APUs, 128 GB HBM3 per APU) on a non-blocking NVIDIA NDR InfiniBand fat-tree, with about 12 PB of disk storage. MPCDF's documentation says it has been operational in its final configuration since February 2025. TOP500 lists it as a Bull system under Red Hat Enterprise Linux with 151,200 cores, Rmax 31.10 PFlop/s, Rpeak 44.16 PFlop/s and 500 kW; it first ranked 55th on the June 2025 list, its best rank. The MPCDF pages fetched do not name an integrator, so the Bull/Eviden edge rests on TOP500 alone.
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
- 2026-10-02 Added Viper-GPU, the MPCDF MI300A partition, 55th on the June 2025 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 |
|---|---|---|
| docs.mpcdf.mpg.de | names system, part and count | AMD Instinct MI300A, NVIDIA InfiniBand NDR (Quantum-2) · counts: 654 |
| top500.org | names system and part | AMD Instinct MI300A, NVIDIA InfiniBand NDR (Quantum-2) |
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
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.