← All Projects

IREN Childress “Horizon” Conversion

Last updated

Bitcoin campus adding liquid-cooled AI halls
Partially operational

Texas's biggest operating bitcoin mine is converting in place: IREN's 750 MW Childress campus is adding 200 kW/rack liquid-cooled AI halls while Microsoft GPU workloads move in.

750 MWPlanned power
Developer
IREN
Owner
IREN
Tenant
IREN AI Cloud; Microsoft: $9.7B/5-yr, 200 MW critical IT load across Horizon 1 to 4; NVIDIA: $3.4B/5-yr managed AI cloud on ~60 MW of existing air-cooled capacity
Power detail
750 MW total site. AI/HPC allocation as of the May 2026 update: 200 MW critical IT load across Horizon 1 to 4 (Microsoft, disclosed), ~60 MW existing air-cooled to NVIDIA (disclosed), a further 100 MW liquid-cooled as Horizon 5 to 6 and 250 MW of retrofitted air-cooled capacity planned for 2027 (disclosed as plan). Bitcoin's share of the campus is shrinking accordingly; IREN took a $140.4M impairment on decommissioned mining equipment in Q3 FY26.
Power source
ERCOT grid, renewable-matched
Cooling
Air + liquid cooling; direct-to-chip liquid at 130 to 200 kW per rack in the Horizon halls, closed-loop with water trucked in from outside Childress County
Compute
Nvidia Blackwell GPUs (Horizon halls)
Construction start
2023 (mining buildout); 2025 (Horizon AI halls)
Est. completion
Horizon 1 delivered to and accepted by Microsoft Aug 13, 2026, on the targeted Q3 CY2026 schedule; Horizons 2 to 4 (150 MW additional critical IT) still targeted by end CY2026; NVIDIA capacity ramping from early 2027; Horizon 5 to 6 and the 250 MW air-cooled retrofit in 2027
Grid strategy
ERCOT grid
County
Childress
Nearest city
Childress (Texas Panhandle)
Announced
2025-02-01