xAI Colossus Memphis Phase 2
Operational; xAI is recorded as owning the AI hardware inside this site
Date in site records: Feb 18, 2025. Site data: Epoch AI GPU Clusters.
Ownership and operation
AI hardware owner · per catalog
xAI 1 finding
Recorded parent
Which organisation owns the AI hardware inside it?
AI hardware owner · per catalog xAI. Epoch AI's field for who owns the AI hardware, which it defines as not necessarily the owner or operator of the facility. source
Export controls and government links
No export-control designations were found in the checked company chains.
Headquarters jurisdiction
A company in the ownership chain is headquartered in the United States
United States: Operates the Export Administration Regulations (EAR) and the BIS Entity List under 15 CFR 730–774; deemed-export rules extend reach to foreign nationals on US soil. Export-control regimes listed for this jurisdiction: Wassenaar Arrangement, US EAR (BIS Entity List authority).
Capacity
Facility power
Excluded from totals to avoid counting this campus twice; the total uses Colossus 1.
Power for IT equipment
Accelerators
200,000 H100-equivalent. Not operating capacity: earlier phase of an operating cluster.
Present inventory by partition
200,000 accelerators across 2 admitted partitions; theoretical dense FP16 peak 197,900 PFLOP/s.
150,000 × NVIDIA H100 SXM5 80GB (estimated)
installed (from the facility status)
989.5 TFLOP/s dense FP16 per accelerator · partition peak 148,425 PFLOP/s · rate citation
Catalogue row; no partition-level source recorded
50,000 × NVIDIA H200 SXM (estimated)
installed (from the facility status)
989.5 TFLOP/s dense FP16 per accelerator · partition peak 49,475 PFLOP/s · rate citation
Catalogue row; no partition-level source recorded
Every partition is admitted from the record’s own evidence; at least one count is flagged as an estimate. Rates are the cited dense FP16 figure per accelerator; the sum applies the methodology’s utilization and interconnect assumptions and is a theoretical aggregate, not one job’s throughput. The catalogue figures above are the record’s scalar fields (the source’s transcription, or its recorded correction) and are a different basis.
xAI Colossus 1 (Memphis) has 4 records, and their power figures are never added together. Across the platform, recorded totals count the marked figure once; operating totals count a member’s figure only if it is operating capacity.
Scope: site total · Status: operational · counted in recorded totals
Scope: named cluster (phase 1) · Status: operational
Scope: named cluster (phase 2) · Status: operational
xAI Colossus Memphis Phase 2
Scope: named cluster (phase 3) · Status: operational
- Any power figure on this record is excluded from power totals to avoid counting overlapping campus capacity twice.
Curator’s working note
Part of campus xAI Colossus 1 (Memphis). This row's power capacity is withheld from aggregates; the campus canonical power figure lives on Colossus 1. See the campus source-disagreement panel for every cited figure.
Methods and sources
Ownership roles
Title identifies the legal owner of the site; operation identifies who runs it. AI-hardware ownership follows the catalog’s attribution of the machines inside, whose owner may lease the facility.
Each role requires its own attribution. An operator named in a source supplies evidence of operation only.
Parent companies
Ownership checks start with each company named at the site and follow recorded parent relationships. A company holding several roles is checked once. Its linked company page lists the relationships and their sources; further parents may remain undocumented.
Level 1 identifies a company at the site, level 2 its parent, and each further level another parent. Export-control designations and government investments are assigned to the company concerned.
Missing values
Unrecorded roles remain blank. Findings whose company position is unresolved stay in the list with that position labelled unknown.
Publication limits
Subscription corporate data helps identify parent relationships and sovereign investments. Publication is limited to relationship classes and supporting public sources; licensed records, identifiers and values are withheld.
Epoch AI estimates capacity using satellite imagery, permits and corporate disclosures. Its catalog is the source for this site record.
Four Epoch records describe xAI’s first Memphis site and its cluster phases. Power totals use Epoch’s site estimate. Phase figures of 150, 280.28 and 352.35 MW remain visible but are excluded from power totals. Epoch’s GPU-clusters data marks phase 1 as superseded by phase 2 and phase 2 by phase 3, so operating accelerator totals count the cluster once, at phase 3.
Related analysis
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