Listed below are the November 2019 The Green500's energy-efficient supercomputers ranked from 1 to 10. For more information about the sites and systems in the list, click on the links or view the complete list.
    
        
    
    
        
            
                | Rank | TOP500 Rank | System | Cores | Rmax (PFlop/s) | Power (kW) | Energy Efficiency (GFlops/watts) | 
            
        
        
            
                | 1 | 159 | A64FX prototype - Fujitsu A64FX, Fujitsu A64FX 48C 2GHz, Tofu interconnect D,
                     Fujitsu Fujitsu Numazu Plant
 Japan
 | 36,864 | 2.00 | 118 | 16.876 | 
        
            
                | 2 | 420 | NA-1 - ZettaScaler-2.2, Xeon D-1571 16C 1.3GHz, Infiniband EDR, PEZY-SC2 700Mhz,
                     PEZY Computing / Exascaler Inc. PEZY Computing K.K.
 Japan
 | 1,271,040 | 1.30 | 80 | 16.256 | 
        
            
                | 3 | 24 | AiMOS - IBM Power System AC922, IBM POWER9 20C 3.45GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Volta GV100,
                     IBM Rensselaer Polytechnic Institute Center for Computational Innovations (CCI)
 United States
 | 130,000 | 8.04 | 510 | 15.771 | 
        
            
                | 4 | 373 | Satori - IBM Power System AC922, IBM POWER9  20C 2.4GHz, Infiniband EDR, NVIDIA Tesla V100 SXM2,
                     IBM MIT/MGHPCC Holyoke, MA
 United States
 | 23,040 | 1.46 | 94 | 15.574 | 
        
            
                | 5 | 1 | Summit - IBM Power System AC922, IBM POWER9 22C 3.07GHz, NVIDIA Volta GV100, Dual-rail Mellanox EDR Infiniband,
                     IBM DOE/SC/Oak Ridge National Laboratory
 United States
 | 2,414,592 | 148.60 | 10,096 | 14.719 | 
        
            
                | 6 | 8 | AI Bridging Cloud Infrastructure (ABCI) - PRIMERGY CX2570 M4, Xeon Gold 6148 20C 2.4GHz, NVIDIA Tesla V100 SXM2, Infiniband EDR,
                     Fujitsu National Institute of Advanced Industrial Science and Technology (AIST)
 Japan
 | 391,680 | 19.88 | 1,649 | 14.423 | 
        
            
                | 7 | 494 | MareNostrum P9 CTE - IBM Power System AC922, IBM POWER9 22C 3.1GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Tesla V100,
                     IBM Barcelona Supercomputing Center
 Spain
 | 18,360 | 1.15 | 81 | 14.131 | 
        
            
                | 8 | 23 | TSUBAME3.0 - SGI ICE XA, IP139-SXM2, Xeon E5-2680v4 14C 2.4GHz, Intel Omni-Path, NVIDIA Tesla P100 SXM2,
                     HPE CII, Institute of Science Tokyo
 Japan
 | 135,828 | 8.12 | 792 | 13.704 | 
        
            
                | 9 | 11 | PANGEA III - IBM Power System AC922, IBM POWER9 18C 3.45GHz, Dual-rail Mellanox EDR Infiniband, NVIDIA Volta GV100,
                     IBM Total Exploration Production
 France
 | 291,024 | 17.86 | 1,367 | 13.065 | 
        
            
                | 10 | 2 | Sierra - IBM Power System AC922, IBM POWER9 22C 3.1GHz, NVIDIA Volta GV100, Dual-rail Mellanox EDR Infiniband,
                     IBM / NVIDIA / Mellanox DOE/NNSA/LLNL
 United States
 | 1,572,480 | 94.64 | 7,438 | 12.723 |