Paul Golding's questions to IREN (IREN) leadership • FY 2025
Question
Paul Golding inquired about the impact of site efficiency (PUE) differences on GPU rollout strategy and the rationale for adding backup generation to existing facilities. He also asked about the design changes for Horizon 1 to accommodate GB300s and the potential impact on financing and future-proofing for Rubin GPUs.
Answer
Chief Commercial Officer Kent Draper explained that GPU deployment is driven more by customer demand for rapid scaling and specific technologies (like liquid cooling) than by PUE variations. He noted the 1.4 PUE for Childress is a peak number, with the average expected to be around 1.2. Redundancy is being added across the fleet to enhance customer service. Draper clarified that Horizon 1's design was updated to support a wider range of rack densities, including lower densities, while still being capable of handling future high-density GPUs like Rubin.