Green500

As of November 2012, an Appro International, Inc. Xtreme-X supercomputer (Beacon) topped the Green500 list with 2.499 LINPACK GFLOPS/W.[3] Beacon is deployed by NICS of the University of Tennessee and is a GreenBlade GB824M, Xeon E5-2670 based, eight cores (8C), 2.6 GHz, Infiniband FDR, Intel Xeon Phi 5110P computer.[4]

As of June 2013, the Eurotech supercomputer Eurora at Cineca topped the Green500 list with 3.208 LINPACK GFLOPS/W.[5] The Cineca Eurora supercomputer is equipped with two Intel Xeon E5-2687W CPUs and two PCI-e connected NVIDIA Tesla K20 accelerators per node. Water cooling and electronics design allows for very high densities to be reached with a peak performance of 350 TFLOPS per rack.[6]

As of November 2014, the L-CSC supercomputer of the Helmholtz Association at the GSI in Darmstadt Germany topped the Green500 list with 5.271 GFLOPS/W and was the first cluster to surpass an efficiency of 5 GFLOPS/W. It runs on Intel Xeon E5-2690 Processors with the Intel Ivy Bridge Architecture and AMD FirePro S9150 GPU Accelerators. It uses in rack watercooling and Cooling Towers to reduce the energy required for cooling.[7]

As of August 2015, the Shoubu supercomputer of RIKEN outside Tokyo Japan topped the Green500 list with 7.032 GFLOPS/W. The then-top three supercomputers of the list used PEZY-SC accelerators (GPU-like that use OpenCL)[8] by PEZY Computing with 1024 cores each and 6–7 GFLOPS/W efficiency.[9][10]

As of June 2019, DGX SaturnV Volta, using "NVIDIA DGX-1 Volta36, Xeon E5-2698v4 20C 2.2GHz, Infiniband EDR, NVIDIA Tesla V100", tops Green500 list with 15.113 GFLOPS/W, while ranked only 469th on Top500.[11] It's only a little bit more efficient than the much bigger Summit ranked 2nd while 1st on Top500 with 14.719 GFLOPS/W, using IBM POWER9 CPUs while also with Nvidia Tesla V100 GPUs.

As of June 2020, Japanese Preferred Networks' supercomputer, using their own chips (and Intel's), "MN-Core Server, Xeon 8260M 24C 2.4GHz, MN-Core, RoCEv2/MN-Core DirectConnect" tops the Green500 list with 21.108 GFLOPS/W, while ranked only 393rd on Top500. Of the big systems making top 10 of the Top500 list, Selene supercomputer is second on the Green500 list (7th on Top500), using Nvidia GPUs and AMD CPUs close behind in efficiency while much larger with 20.518 GFLOPS/W, and HPC5 supercomputer 6th on both lists, also using Nvidia GPUs but IBM's Power CPUs, and similarly Summit the previous top supercomputer, now in second place (8th on green500), and the current top supercomputer Fugaku (9th on Green500) uses British-design ARM-based CPUs with instruction set extensions developed by Japanese Fujitsu, the maker of the supercomputer, while notably GPUs are absent at 14.665 GFLOPS/W.[12]

energy efficiency of top-ranked computers (Gigaflops/Watt)