Sweden · decommissioned · ai training

Alvis

Also known as NAISS Alvis

Operated by C3SE at Chalmers C3SE (Gothenburg) .

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: 1.94 PFlop/s
Rpeak: 3.60 PFlop/s
Rmax ÷ Rpeak: 53.9%
Cores: 41,664
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	- Lenovo (TOP500 manufacturer field)	Lenovo 992HKEX	-	Reported	top500.org
Accelerator	- 336 NVIDIA A100 GPUs (HGX, 40 GB and 80 GB variants)	NVIDIA NVDANASDAQ	336 reported	Reported	naiss.se c3se.chalmers.se
Accelerator	- 340 NVIDIA A40 GPUs (85 nodes x 4)	NVIDIA NVDANASDAQ	340 reported	Reported	naiss.se c3se.chalmers.se
Accelerator	NVIDIA Tesla V100 Accelerators CUDA (Volta GV100) · 5,120C · 1.53 GHz · 12 nm · 300 W 44 NVIDIA V100 SXM2 GPUs (12 nodes x 2 plus 5 nodes x 4)	NVIDIA NVDANASDAQ	44 reported	Reported	naiss.se c3se.chalmers.se
Accelerator	- 160 NVIDIA T4 GPUs (20 nodes x 8)	NVIDIA NVDANASDAQ	160 reported	Reported	naiss.se c3se.chalmers.se
CPU	- Intel Xeon 6338 32C 2.0GHz (TOP500) on A100 nodes; Xeon Gold 6226R and 8358 on CPU-only nodes	Intel INTCNASDAQ	-	Reported	top500.org c3se.chalmers.se
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds InfiniBand HDR (TOP500); C3SE cites 100 Gbit InfiniBand to storage	NVIDIA NVDANASDAQ	-	Reported	top500.org c3se.chalmers.se

The read

Chalmers C3SE's national NAISS (formerly SNIC) AI and machine-learning GPU cluster. TOP500 lists it as a Lenovo system with Xeon 6338 32C CPUs, NVIDIA A100 and InfiniBand HDR, installed 2022, with 41,664 cores, 1.94 PFLOPS Rmax and 3.60 PFLOPS Rpeak; it ranked 403rd in June 2022, 440th in November 2022 and 484th in June 2023. NAISS states 160 T4, 44 V100, 340 A40 and 336 A100 GPUs across the two build phases, and C3SE's hardware page lists V100, T4, A40, A100 (40 GB and 80 GB) node types plus a 740 TB all-flash Mimer storage tier and about 7 PB of bulk storage. NAISS now marks Alvis as retired, with users migrated to the Arrhenius system, so it is recorded as decommissioned (exact retirement date not published).

Timeline

2022-06 List debut at #403 (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.

#403: TOP500, June 2022 →

Site & facility

Chalmers C3SE (Gothenburg)

Location: Gothenburg, Sweden

naiss.se c3se.chalmers.se

Change history

2026-10-02 Added Alvis, Chalmers C3SE's NAISS A100 AI 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
top500.org	names system, part and count	NVIDIA InfiniBand HDR · counts: 44
naiss.se	names system only	· counts: 44

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