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In June 2005, 4 systems appeared in the TOP500 list.
| Rank | System | Procs | Memory(GB) | Rmax (GFlops) | Rpeak (GFlops) | Vendor |
|---|---|---|---|---|---|---|
| 5 |
MareNostrum JS20 Cluster, PPC 970, 2.2 GHz, Myrinet |
4800 | 9600 | 27910 | 42144 | IBM |
| 235 | Cray X1E | 124 | N/A | 1860.6 | 2241.92 | Cray Inc. |
| 352 | eServer BladeCenter JS20 (PowerPC970 2.2 GHz), Myrinet | 248 | N/A | 1451.4 | 2182.4 | IBM |
| 453 | Integrity Superdome, 1.5 GHz, HPlex | 256 | N/A | 1210 | 1536 | HP |