Isambard-AI is a 200 PF Grace+Hopper system at Bristol.
- Cray EX2500 (Phase 1) and Cray EX4000 (Phase 2)
- 5,448 GH200 superchips (1,362 nodes)
At the 2024 Cray User Group meeting, Simon McIntosh-Smith presented a paper with the following information in the abstract:
Isambard-AI: a leadership-class supercomputer optimised specifically for Artificial Intelligence
Based on the HPE Cray EX4000 system, and housed in a new, energy efficient Modular Data Centre in Bristol, UK, Isambard-AI employs 5,448 NVIDIA Grace-Hopper GPUs to deliver over 21 ExaFLOP/s of 8-bit floating point performance for LLM training, and over 250 PetaFLOP/s of 64-bit performance, for under 5MW. Isambard-AI integrates two, all-flash storage systems: a 20 PiByte Cray ClusterStor and a 3.5 PiByte VAST solution.
