Isambard-AI phase 2 - HPE Cray EX254n, NVIDIA Grace 72C 3.1GHz, NVIDIA GH200 Superchip, Slingshot-11, HPE Cray OS

Site: University of Bristol
Manufacturer: HPE
Cores: 1,028,160
Processor: NVIDIA Grace 72C 3.1GHz
Interconnect: Slingshot-11
Installation Year: 2025
Performance
Linpack Performance (Rmax) 216.50 PFlop/s
Theoretical Peak (Rpeak) 278.58 PFlop/s
Nmax 10,399,744
Software
Operating System: HPE Cray OS
Compiler: HPL-NVIDIA 25.2.0
Math Library: HPL-NVIDIA 25.2.0
MPI: HPE Cray MPI
List Rank System Vendor Total Cores Rmax (PFlop/s) Rpeak (PFlop/s) Power (kW)
06/2025 11 HPE Cray EX254n, NVIDIA Grace 72C 3.1GHz, NVIDIA GH200 Superchip, Slingshot-11, HPE Cray OS HPE 1,028,160 216.50 278.58