Isambard-AI
Bristol Centre for Supercomputing, University of Bristol
Isambard-AI, the UK's most powerful AI supercomputer, is nominated as a model of sustainable supercomputer design. It sits in a compact, modular data centre on existing science park land near Bristol and uses direct liquid cooling in a closed loop, using about as much water as 18 average UK homes.
Its cooling needs only around 7% extra power, against around 80% for a typical supercomputer, and it ranks among the greenest supercomputers in the world on the Green500 list. It hosts around 4,000 users and more than 1,000 research projects, including work on climate and air pollution.
Judges' analysis
The judges recognised a national-scale system with sustainability designed in from the start, backed by clear figures on energy, water and footprint. It shows how large AI infrastructure can be built responsibly.