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Supercomputer at Jülich Supercomputing Centre in Forschungszentrum Jülich, operational from June 2012 to May 2018)
It was the first supercomputer in Europe to reach a maximum compute performance of 5.9 Petaflop/s – equating to almost 6 quadrillion operations per second. JUQUEEN is an IBM BlueGene/Q system based on the IBM POWER architecture with 458,752 compute cores in 28 racks. Supercomputers of this kind are among the most energy efficient supercomputers in the world with a performance/power ratio of approximately 2 Gigaflop/s per Watt.

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