IBM tops Green500 list

In the latest Green500 supercomputer list published by Green500.org, 18 of 20 fastest supercomputers are powered by IBM. The most efficient cluster is the BladeCenter QS22 Cluster built with PowerXCell 8i 4.0 Ghz processor and Infiniband in University of Warsaw. Actually this cluster is not a computing monster provided the max performance is 18.57 TFLOPs which ranks 422 in the Top500 chart. But the total power consumption is merely 34.63 kW. This achieves an impressive performance/power ratio of 536.24 MFLOPS/W.