[H]ardOCP:

A new report found that IBM supercomputers already deemed the most powerful in the world are also the most energy efficient according to the findings of the latest Supercomputing ’Green 500 List’ announced by The Green500.org. The report found that the top 20 most energy efficient supercomputers in the world are built on IBM high performance computing technology. …IBM also holds 39 of the top 50 positions on this list.