Supercomputers/Systems/Emmy
Germany · operational · hpc
Emmy
Also known as HLRN-IV Emmy, Emmy+
Operated by GWDG .
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
- 5.95 PFlop/s
- Rpeak
- 8.91 PFlop/s
- Rmax ÷ Rpeak
- 66.8%
- Cores
- 120,296
- 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 | - BullSequana X system (TOP500 manufacturer: Bull) | Atos | - | Reported | top500.org |
| CPU | - 974 phase 2 nodes with two Intel Xeon Platinum 9242 (quantity is nodes) | Intel | 974 reported | Verified | gwdg.detop500.org |
| CPU | Intel Xeon Gold 6148 CPUs x86-64 · 20C · 2.4 GHz · 14 nm · 150 W 449 phase 1 nodes with Intel Xeon Gold 6148 (quantity is nodes) | Intel | 449 reported | Reported | gwdg.de |
| Interconnect | Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond 100 Gb/s Intel Omni-Path fat tree with two 896-port director switches | Cornelis Networks | - | Verified | gwdg.detop500.org |
The read
GWDG and the University of Goettingen's CPU supercomputer for NHR-NORD@Goettingen (formerly HLRN-IV), a Bull/Atos BullSequana X system. GWDG lists 1,423 nodes: phase 1 with 449 Intel Xeon Gold 6148 nodes and phase 2 with 974 nodes of dual Xeon Platinum 9242 (Cascade Lake AP), 478 TB of RAM, a 100 Gb/s Intel Omni-Path fat tree, 8.4 PiB of parallel storage and 6.4 PiB of tape, with phase 2 cooled by direct hot water. TOP500 lists Emmy+ (Xeon Platinum 9242 48C, Omni-Path) at 120,296 cores, 5.95 PFlop/s Rmax and 8.91 PFlop/s Rpeak, peak rank 47th in November 2020; GWDG cites 111,464 total cores, so core counts differ by source and the TOP500 figure is used with its HPL result.
Timeline
- 2020-11 List debut at #47 (November 2020) source
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 Emmy (GWDG)
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 |
|---|---|---|
| gwdg.de | names system, part and count | Intel Xeon Gold 6148, Omni-Path Architecture · counts: 449 |
| top500.org | names system and part | Intel Xeon Gold 6148, Omni-Path Architecture |
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.