The top three positions in the Green500 are all taken by supercomputers installed in Japan that are based on the ZettaScaler-2.2 architecture using PEZY-SC2 accelerators, while all other system in the top 10 use NVIDIA GPUs.
The most energy-efficient supercomputer is once again the Shoubu system B, a ZettaScaler-2.2 system installed at the Advanced Center for Computing and Communication, RIKEN, Japan. It was remeasured and achieved 18.4 gigaflops/watt during its 858 teraflops Linpack performance run. It is ranked number 362 in the TOP500 list.
The second-most energy-efficient system is Suiren2 system at the High Energy Accelerator Research Organization/KEK, Japan. This ZettaScaler-2.2 system achieved 16.8 gigaflops/watt and is listed at position 421 in the TOP500. Number three on the Green500 is the Sakura system installed at PEZY Computing. It achieved 16.7 gigaflops/watt and occupies position 388 on the TOP500 list.
They are followed by the DGX SaturnV Volta system in the US; the Summit system in the US, the TSUBAME 3.0 system, AIST AI Cloud system, the AI Bridging Cloud Infrastructure (ABCI) system, all from Japan; the new IBM MareNostrum P9 cluster in Spain; the DOE’s Summit system; and Wilkes-2, from the UK. All of these systems use various NVIDIA GPUs.
The most energy-efficient supercomputer that doesn’t rely on accelerators of any kind is the Sunway TaihuLight, which is powered exclusively by ShenWei processors. Its 6.05 gigaflops/watt earned it 22nd place on the Green500 list.
Green500 List for June 2018
Listed below are the June 2018 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.
Shaded entries in the table below mean the power data is derived and not meassured.