The most energy-efficient system and No. 1 on the Green500 is the DGX SaturnV Volta system, a NVIDIA system installed at NVIDIA, USA. It achieve 15.1 GFlops/Watt power efficiency. It is on position 469 in the TOP500.
They are followed on No 3 by Summit at the Oak Ridge National Laboratory (ORNL) in Tennessee. It achieved 14.7 gigaflops/watt and is listed at number one in the TOP500.
The Shoubu system B, a ZettaScaler-2.2 system at the Advanced Center for Computing and Communication, RIKEN, Japan was decommissioned March 2019 and was removed from the TOP500 list.
Green500 List for June 2019
Listed below are the June 2019 The Green500's energy-efficient supercomputers ranked from 1 to 10.
Note: Shaded entries in the table below mean the power data is derived and not meassured.