United Kingdom · operational · hpc

Wilkes-2

Operated by University of Cambridge at University of Cambridge (CSD3) .

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: 1.19 PFlop/s
Rpeak: 1.75 PFlop/s
Rmax ÷ Rpeak: 68.1%
Cores: 21,240
Power: 114.4 kW
Per watt: 10.4 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	- Dell C4130	Dell Technologies DELLNYSE	-	Verified	top500.org prnewswire.com
Accelerator	NVIDIA Tesla P100 Accelerators CUDA (Pascal GP100) · 3,584C · 1.48 GHz · 16 nm · 300 W NVIDIA Tesla P100	NVIDIA NVDANASDAQ	-	Reported	top500.org
CPU	Intel Xeon E5-2650 v4 CPUs x86-64 · 12C · 2.2 GHz · 14 nm Xeon E5-2650v4 12C 2.2GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Mellanox InfiniBand EDR Interconnect Fat tree · 100 Gb/s per 4x port · About 0.9 microseconds Infiniband EDR	Mellanox NVDANASDAQ rolls up to NVIDIA	-	Reported	top500.org

The read

Cambridge's GPU successor to the original 2013 Wilkes cluster: Dell C4130 nodes, each two Xeon E5-2650v4 CPUs plus NVIDIA Tesla P100 accelerators, on InfiniBand EDR. Dell EMC's own ISC 2017 announcement independently confirms TOP500's ranking context, describing it as the largest GPU system in the UK, part of a $12M investment, ranked 100th on that TOP500 list and 5th on Green500; both TOP500's June 2017 Green500 list and Dell EMC's release independently agree on the 5th-place Green500 rank. Exact Rmax, Rpeak and core count rest on TOP500 alone, so the tier is reported. No source fetched states a decommission date, so the last confirmed TOP500 appearance (November 2019) is carried as status_as_of rather than inferring a retirement, the same convention used for Tianhe-1A.

Timeline

2017 Announced source
2017 First operational source
2017-06 List debut at #101 (June 2017) source

Public list appearances

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

Site & facility

University of Cambridge (CSD3)

Location: Cambridge, United Kingdom
Commissioned: 2024

docs.hpc.cam.ac.uk

Change history

2026-09-24 Wilkes-2 added

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 and part	NVIDIA Tesla P100, Intel Xeon E5-2650 v4, Mellanox InfiniBand EDR
prnewswire.com	names system and part	Intel Xeon E5-2650 v4

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