The system to take the top spot on the GREEN500 was the Henri system at the Flatiron Institute in the United States. Although the machine ranked at No. 405 on the TOP500 list, it had a successful showing in terms of its energy efficiency. The system has an efficiency score of 65.09 GFlops/Watts, 5,920 cores, and an HPL score of 2.038 PFlop/s.
Last list’s winner of the GREEN500 was the Frontier TDS machine, which has since moved down to the No. 2 spot. This system achieved an efficiency score of 62.68 GFlops/Watts, it has 120,832 total cores, and achieved an HPL score of 19.2 PFlop/s that earned it the No. 32 spot on the TOP500. Considering the Frontier TDS machine is basically just one rack identical to the ones used in the actual Frontier system, it would make sense that this machine is much more powerful than the No. 1 Henri system.
The No. 3 spot on the GREEN500 list saw an interesting development from the Adastra machine from France’s GENCI-CINES. On top of its high ranking in energy efficiency, this machine also captured the No. 11 spot on the TOP500. The Adastra system achieved an energy efficiency rating of 58.02 GFlops/Watts on top of its impressive HPL score of 46.1 PFlop/s.
However, in terms of both power and energy efficiency, the Frontier system once again shows some impressive results. Despite dropping from the No. 2 spot on the last GREEN500 to the No. 6 spot on this list, Frontier still provided incredible power for the amount of energy going in. The machine is able to produce 1.102 EFlop/s in HPL performance, all with an energy efficiency of 52.23 GFlops/Watts. Frontier is proof that the most powerful machines in the world don’t need to focus on performance at the expense of energy efficiency.