IREN Horizon 1
IREN delivered Horizon 1 to Microsoft as the first of four liquid-cooled GPU deployments at Childress.
IREN Horizon 1 is an operational GPU cluster run by IREN in Childress, Texas, United States. It runs NVIDIA GB300 NVL72; no installed GPU count is published. Live power: 50 MW.
Facts
Source per value- Owner / operator Organization that owns or operates the GPUs. Hosting and facility roles are listed under Partners.
- IREN 1
- GPU maker NVIDIA, AMD or Intel, taken from the GPU model.
- NVIDIA 1
- GPU model Accelerator model or family as disclosed. A GH200 is one GPU on a superchip; an MI300A is an APU that contains a GPU.
- NVIDIA GB300 NVL72 1
- GPUs installed Physical GPUs in the cluster, from the operator or a deterministic sum of disclosed quantities (nodes × GPUs per node). Planned counts, H100-equivalents and unaudited press totals are never counted here.
- Not published
- GPU count notes What the count covers (one partition, one site, a design limit), qualifiers and competing figures.
- Horizon 1 only; GPU count not disclosed here and four-building totals are not assigned to it. 1
- Location City, region and country where the cluster sits. Empty when the operator does not name the site.
- Childress, Texas, United States 1
- Country Country of the cluster, taken from the location.
- United States 1
- Live power MW Power in service, in megawatts of IT load where the source says so. Company figures are marked in the notes; Epoch AI satellite estimates are labelled as estimates.
- 50 1
- Power notes Basis and date of the power figures, and who published them.
- 50 MW IT, delivered to Microsoft in August 2026. The four Horizon halls total about 200 MW IT. 1
- Status operational = running and named as such by the operator or a primary source; partly operational = a phase is live and more is coming; under construction = building underway; announced = disclosed or contracted with no confirmed go-live.
- operational 1
- Operational since Month or year the source gives for the cluster going live (first phase for partly operational clusters). Empty when no date is published.
- 2026-08 1
- Status notes The source’s wording on status, with the date.
- Delivered to Microsoft in August 2026. 1
- Figures as of Date of the source disclosure behind the figures, where the source dates it.
- 2026-08-27 1
- Partners Customer, facility owner, builder or procurement body, as named by the source.
- Customer: Microsoft 1
Sources
- iren.gcs-web.com accessed 2026-11-11
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