Supercomputers/Systems/AWS Madison Mega Site (Canton)
USA · operational · ai training
AWS Madison Mega Site (Canton)
Deep dive: Project Rainier: Amazon's Anthropic cluster
Also known as AWS Canton Mississippi
Operated by Amazon at AWS Canton Madison Mega Site .
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
- -
- Rpeak
- -
- Rmax ÷ Rpeak
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- Cores
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- 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 | - AWS builds and operates the Canton, Madison County, Mississippi data center campus | Amazon | - | Reported | mississippi.orgmississippifreepress.org |
| Accelerator | AWS Trainium2 Accelerators NeuronCore-v3 · TSMC 5nm Epoch AI estimate: about 326,600 AWS Trainium2 chips (modelled, not disclosed by Amazon) | Amazon | 326,600 estimated | Reported | epoch.ai |
AI datacenter metrics
Figures beyond an accelerator count, each with who stated it. What can and cannot be compared across AI datacenters.
| Metric | Value | As of | Basis | Note | Source |
|---|---|---|---|---|---|
| Accelerators | 326,600 accelerators | 2026-10-02 | Third-party estimate | About 326,600 Trainium2; Epoch projects about 783,700 by Q1 2028. Epoch AI chip estimate (modelled from satellite imagery, cooling equipment and chip availability); not an operator disclosure. | epoch.ai |
| Stated investment | 10.8 USD bn | 2026-10-02 | Third-party estimate | Epoch AI modelled build cost, compute plus construction, 2025 USD, scaled from IT power; not a disclosed spend. | epoch.ai |
| IT power | 284 MW | 2026-10-02 | Third-party estimate | Epoch AI modelled IT power from satellite imagery and permits; not operator-stated. Epoch projects 683 MW by Q1 2028. | epoch.ai |
How it is powered
| Source | Provider | MW | Status | As of | Basis | Note | Source link |
|---|---|---|---|---|---|---|---|
| Grid | Entergy Mississippi | - | operating | 2026-10 | Third-party estimate | Mississippi Development Authority says Entergy Mississippi long-term power commitment was a key factor in Amazon expanding in Mississippi; no MW stated. | mississippi.org |
How AI campuses are powered: capacities are what the operator, utility or filing states, not what has been delivered.
The read
Amazon Web Services' Canton campus on and beside the Madison County Mega Site in Mississippi, one of two Madison County AWS campuses with Ridgeland. Mississippi's economic development agency announced on 9 April 2026 a further 11 billion dollars for Madison County, on top of the 10 billion dollars announced in 2024, and framed it around generative and agentic AI, with Entergy Mississippi power as a stated factor; the page gives no per-campus hardware or MW. Epoch AI's AI data centers dataset (CC BY 4.0) estimates about 326,600 Trainium2 chips and 284 MW of IT power as of 2 October 2026, with buildings 1 to 5 operational by June 2025, from an air construction permit and satellite imagery. Epoch labels a link to Anthropic and Project Rainier as speculative, so this row is not tied to the existing Project Rainier row. Epoch's figures are modelled estimates in the metrics table only. Hardware rests on Epoch alone, so the tier is reported.
Site & facility
AWS Canton Madison Mega Site
- Location
- Canton, MS, USA
- Utility
- Entergy Mississippi
- Commissioned
- 2025
Change history
- 2026-10-04 Added AWS Madison Mega Site (Canton)
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 |
|---|---|---|
| epoch.ai | names system only | - |
| mississippi.org | could not be fetched | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.