Austria · operational · hpc

VSC-5

Operated by Vienna Scientific Cluster at Vienna Scientific Cluster .

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: 2.31 PFlop/s
Rpeak: 3.05 PFlop/s
Rmax ÷ Rpeak: 75.7%
Cores: 95,232
Power: 516 kW
Per watt: 4.5 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	- MEGWARE SlideSX	MEGWARE	-	Verified	top500.org asc.ac.at
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W 60 GPU-partition nodes of two NVIDIA A100 40GB each, never itself submitted to TOP500	NVIDIA NVDANASDAQ	120 estimated	Reported	asc.ac.at
CPU	AMD EPYC 7713 (Milan) CPUs x86-64 · 64C · 2 GHz · 7 nm · 225 W AMD EPYC 7713 64C 2GHz across 710 CPU-partition nodes	AMD AMDNASDAQ	-	Verified	top500.org asc.ac.at
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox/NVIDIA InfiniBand HDR, 200 Gbit/s	NVIDIA NVDANASDAQ	-	Verified	top500.org asc.ac.at
Cooling	Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid Direct hot-water cooling (MEGWARE ColdCon) on the CPU partition, up to 50C supply	MEGWARE	-	Reported	asc.ac.at

The read

Austria's national system, jointly funded and operated by six universities (TU Wien, University of Vienna, TU Graz, University of Innsbruck, BOKU and JKU Linz) and built by German integrator MEGWARE. TOP500's benchmarked configuration is the 710-node AMD EPYC 7713 CPU partition, direct hot-water cooled to 50C by MEGWARE's own ColdCon system; a separate 60-node NVIDIA A100 GPU partition exists per the consortium's own page but was never itself submitted to TOP500. 301st on the June 2022 TOP500, its best-ever rank. TOP500 is the only source for Rmax, Rpeak and core count, so the tier is reported.

Timeline

2022 First operational source
2022-06 List debut at #301 (June 2022) source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

#301: TOP500, June 2022 →

Site & facility

Vienna Scientific Cluster

Location: Vienna, Austria
Commissioned: 2022

asc.ac.at top500.org

Change history

2026-09-24 Added: first supercomputer from Austria in the dataset, the six-university Vienna Scientific Cluster

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
asc.ac.at	names system, part and count	AMD EPYC 7713 (Milan), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR, Direct liquid cooling, warm water · counts: 120
top500.org	names system and part	AMD EPYC 7713 (Milan), NVIDIA InfiniBand HDR

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.