Lassen - IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100

Site: DOE/NNSA/LLNL
Manufacturer: IBM / NVIDIA / Mellanox
Cores: 288,288
Processor: IBM POWER9 22C 3.1GHz
Interconnect: Dual-rail Mellanox EDR Infiniband
Installation Year: 2018
Performance
Linpack Performance (Rmax) 18.20 PFlop/s
Theoretical Peak (Rpeak) 23.05 PFlop/s
Nmax 5,059,584
Software
Operating System: Red Hat Enterprise Linux
Compiler: IBM XLC
Math Library: ESSL, CUBLAS 10.1
MPI: IBM Spectrum MPI
List Rank System Vendor Total Cores Rmax (PFlop/s) Rpeak (PFlop/s) Power (kW)
06/2025 88 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2024 72 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2024 57 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2023 45 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2023 36 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2022 34 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2022 30 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2021 26 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2021 20 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2020 17 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2020 14 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2019 10 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
06/2019 10 IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 288,288 18.20 23.05
11/2018 11 IBM Power System S922LC, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100 IBM / NVIDIA / Mellanox 248,976 15.43 19.90