IBM ranking of energy-efficient supercomputers in the world once again issued the first place. In contrast to the recently updated Top 500 list is the decisive criterion here is not the computing power, but how many floating-point operations per second (flops), a system can perform per watt. The winner of Blue Gene / Q from IBM Research in 1684 puts it in mega flops per watt, which is about 77 percent more economical than the second placed Tsubame 2.0 (948 Mega Flops / Watt), in the GSIC Center Tokyo Institute of Technology is the.

They are followed by HPC systems of the National Center for Supercomputing Applications of the University of Illinois at Urbana-Champaign , 933 mega flops per watt and the RIKEN Advanced Institute for Computational Science 828 mega flops per watt with. The top three systems in the July-list can be found in November only rank five to seven again. The QPACE clusters 8i processors from IBM are driven PowerX Cell of reach, each 773 mega flops per watt. All three are in Germany at the University of Regensburg and the University of Wuppertal. With 741 watts per Megapflops does a computer of the University of Frankfurt in eighth place also in the top ten most fuel-efficient supercomputer.

This is of systems of the Georgia Institute of Technology in ninth (677 Mega Flops / Watt) and the National Supercomputing Center in Tianjin (635 Mega Flops / Watt) completed in. The latter bears the name of Tianhe-1A and is considered a performance of 2.507 petaflops on the Linpack benchmark at the same time as the currently fastest supercomputer in the world. A striking feature of the current Green500 list is that four of the ten most fuel-efficient HPC systems based on graphics processors, such as NvidiaTesla GPUs. "GPU-based supercomputer is more on the Green500 list find-that shows that heterogeneous system solutions with high performance CPUs and GPUs and offer efficiency alike," said Wu-chun Feng, founder of Green500.org the result.