SAKURAONE CYB

Operated by SAKURA internet at SAKURA internet (Ishikari) .

Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 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: 13.05 PFlop/s
Rpeak: 14.81 PFlop/s
Rmax ÷ Rpeak: 88.1%
Cores: 63,744
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	- Supermicro SuperServer B200	Supermicro SMCINASDAQ	-	Reported	top500.org sakura.ad.jp
Accelerator	NVIDIA B200 SXM Accelerators CUDA (Blackwell) · TSMC 4NP · 1,000 W 48 B200 nodes with eight NVIDIA B200 SXM 180GB GPUs each (service page; TOP500 entry not named)	NVIDIA NVDANASDAQ	384 estimated	Reported	sakura.ad.jp top500.org
CPU	Intel Xeon 6 6900P (Granite Rapids) CPUs x86-64 · 128C · 2 GHz · Intel 3 · 500 W Two Intel Xeon 6960P (72 cores) per node across 48 nodes	Intel INTCNASDAQ	96 estimated	Reported	sakura.ad.jp top500.org
Operating system	Rocky Linux Operating systems RHEL-compatible Linux, community-maintained · Downstream rebuild of Red Hat Enterprise Linux source Rocky Linux 9.6	Rocky Enterprise Software Foundation	-	Reported	top500.org

The read

The B200-based entry in SAKURA internet's SAKURAONE family (see sakuraone for the original H100 machine and sakuraone-cyc for the H200 one). TOP500 lists SAKURAONE CYB as a Supermicro SuperServer B200 with Intel Xeon 6960P 72C 2.7 GHz and NVIDIA B200 SXM 180 GB under 'SAKURA Internet Inc. / Prunus Solutions Inc.', installed 2025, with 63,744 cores, Rmax 13.05 and Rpeak 14.81 PFlop/s, HPCG 380.332 TFlop/s and Rocky Linux 9.6; it ranked 136th in November 2025 and 156th in June 2026. SAKURA's managed-HPC service page offers a B200 partition of 48 nodes with eight B200 GPUs (384 GPUs) and two Xeon 6960P per node (6,912 cores); the 384 GPUs at roughly 38 TFlop/s FP64 each would give a peak close to TOP500's 14.81 PFlop/s, but the page does not name the TOP500 entry, so tying the 48-node partition to CYB is our inference. The larger June 2026 entry CYD (37.79 PFlop/s) does not fit that node count and is not recorded here.

Timeline

2025 First operational source
2025-11 List debut at #136 (November 2025) source

Public list appearances

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

#136: TOP500, November 2025 →

Site & facility

SAKURA internet (Ishikari)

Location: Ishikari, Japan

top500.org

Change history

2026-10-17 Added SAKURAONE CYB

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
sakura.ad.jp	names system, part and count	NVIDIA B200 SXM, Intel Xeon 6 6900P (Granite Rapids) · counts: 384, 96
top500.org	names system, part and count	NVIDIA B200 SXM, Intel Xeon 6 6900P (Granite Rapids), Rocky Linux · counts: 96

Checked 2026-10-18 by pnpm verify. Re-run it and the table changes with the web.