June 2005

The 25th TOP500 List was introduced during the International Supercomputer Conference (ISC2005) in Heidelberg, Germany.

The No. 1 position was again claimed by the BlueGene/L System, a joint development of IBM and DOE's National Nuclear Security Administration (NNSA) and installed at DOE's Lawrence Livermore National Laboratory in Livermore, Calif. BlueGene/L also occupied the No. 1 position on the last TOP500 list issued in November 2004. However, the system was doubled in size during the last six months and reached a new record Linpack benchmark performance of 136.8 TFlop/s ("teraflops" or trillions of calculations per second). This system, once completed, will again be doubled in size and is expected to remain the #1 Supercomputer in the world for the next few editions of the TOP500 list.

The pace of innovation and performance improvements seen at the very high end of scientific computing shows no sign of slowing down. This time, half of the TOP10 systems on the November 2004 TOP500 list were displaced by newly installed systems and the last 201 systems on the list from last November are now too small to be listed any longer.

TOP 10 Sites for June 2005

For more information about the sites and systems in the list, click on the links or view the complete list.

Rank Site System Cores Rmax (TFlop/s) Rpeak (TFlop/s) Power (kW)
United States
BlueGene/L - eServer Blue Gene Solution
65,536 136.8 183.5 716
2 IBM Thomas J. Watson Research Center
United States
BGW - eServer Blue Gene Solution
40,960 91.3 114.7 448
3 NASA/Ames Research Center/NAS
United States
Columbia - SGI Altix 1.5 GHz, Voltaire Infiniband
10,160 51.9 61.0
4 Japan Agency for Marine -Earth Science and Technology
5,120 35.9 41.0 3,200
5 Barcelona Supercomputing Center
MareNostrum - JS20 Cluster, PPC 970, 2.2 GHz, Myrinet
4,800 27.9 42.1
6 ASTRON/University Groningen
Stella - eServer Blue Gene Solution
12,288 27.4 34.4 134
7 Lawrence Livermore National Laboratory
United States
Thunder - Intel Itanium2 Tiger4 1.4GHz - Quadrics
California Digital Corporation
4,096 19.9 22.9
8 Computational Biology Research Center, AIST
Blue Protein - eServer Blue Gene Solution
8,192 18.2 22.9 89
9 Ecole Polytechnique Federale de Lausanne
eServer Blue Gene Solution
8,192 18.2 22.9 89
10 Sandia National Laboratories
United States
Red Storm, Cray XT3, 2.0 GHz
Cray Inc.
5,000 15.2 20.0