The Green500 List - February 2008
Listed below are the The Green500's Top 10 most energy-efficient supercomputers in the world as of February 2008.
| Green500 Rank | MFLOPS/W | Site* | Computer* | Total Power (kW) |
| 1 | 357.23 | Science and Technology Facilities Council - Daresbury Laboratory | "Blue Gene/P Solution | 31.1 |
| 2 | 352.25 | Max-Planck-Gesellschaft MPI/IPP | "Blue Gene/P Solution | 62.2 |
| 3 | 346.95 | IBM - Rochester | "Blue Gene/P Solution | 124.4 |
| 4 | 336.21 | Forschungszentrum Juelich (FZJ) | "Blue Gene/P Solution | 497.6 |
| 5 | 310.93 | Oak Ridge National Laboratory | "Blue Gene/P Solution | 70.47 |
| 6 | 210.56 | Harvard University | "eServer Blue Gene Solution | 44.8 |
| 7 | 210.56 | High Energy Accelerator Research Organization /KEK | "eServer Blue Gene Solution | 44.8 |
| 8 | 210.56 | IBM - Almaden Research Center | "eServer Blue Gene Solution | 44.8 |
| 9 | 210.56 | IBM Research | "eServer Blue Gene Solution | 44.8 |
| 10 | 210.56 | IBM Thomas J. Watson Research Center | "eServer Blue Gene Solution | 44.8 |
* Performance data obtained from publicly available sources including TOP500
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