| Rank | Site | Computer | Cores | Year | Rmax | Rpeak | | 101 | Petroleum Company (D) China | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 512 | 2004 | 1922.56 | 3133.44 |
| 102 | Naval Oceanographic Office (NAVOCEANO) United States | eServer pSeries 655 (1.5 GHz Power4+) IBM | 512 | 2004 | 1918.57 | 3072 |
| 103 | National Centers for Environmental Prediction United States | pSeries 690 Turbo 1.3GHz IBM | 704 | 2002 | 1849 | 3660.8 |
| 104 | National Centers for Environmental Prediction United States | pSeries 690 Turbo 1.3GHz IBM | 704 | 2002 | 1849 | 3660.8 |
| 105 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 546 | 2004 | 1817.26 | 3057.6 |
| 106 | University at Buffalo, SUNY, Center for Computational Res. United States | BladeCenter Xeon 2.8 GHz, Gig-Ethernet IBM | 546 | 2004 | 1817.26 | 3057.6 |
| 107 | Silicon Graphics United States | SGI Altix 1.3 GHz SGI | 512 | 2004 | 1793 | 2662.4 |
| 108 | SARA (Stichting Academisch Rekencentrum) Netherlands | SGI Altix 1.3 GHz SGI | 416 | 2003 | 1793 | 2163 |
| 109 | IBM/US Army Research Laboratory (ARL) United States | eServer Opteron 2.2 GHz. Myrinet IBM | 594 | 2004 | 1785 | 2613.6 |
| 110 | IBM/US Army Research Laboratory (ARL) United States | eServer Opteron 2.2 GHz. Myrinet IBM | 594 | 2004 | 1785 | 2613.6 |
| 111 | IBM/US Army Research Laboratory (ARL) United States | eServer Opteron 2.2 GHz. Myrinet IBM | 592 | 2004 | 1779 | 2604.8 |
| 112 | IBM/US Army Research Laboratory (ARL) United States | eServer Opteron 2.2 GHz. Myrinet IBM | 592 | 2004 | 1779 | 2604.8 |
| 113 | KISTI Supercomputing Center Korea, South | xSeries Xeon 2.8 GHz - Myrinet IBM | 512 | 2004 | 1762 | 2867 |
| 114 | VW (Volkswagen AG) Germany | xSeries Xeon 2.8 GHz - Myrinet IBM | 512 | 2004 | 1762 | 2867 |
| 115 | KISTI Supercomputing Center Korea, South | pSeries 690 Turbo 1.7 GHz IBM | 544 | 2003 | 1760 | 3699.2 |
| 116 | Semiconductor Company (C) United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 1834 | 2003 | 1755 | 8803.2 |
| 117 | Compagnie Generale de Geophysique (CGG) United Kingdom | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 1100 | 2003 | 1755 | 5280 |
| 118 | Arizona State University/TGEN United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 1048 | 2003 | 1755 | 5030.4 |
| 119 | Paradigm Geophysical United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 1024 | 2003 | 1755 | 4915.2 |
| 120 | TotalFinaElf France | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 1024 | 2003 | 1755 | 4915.2 |
| 121 | Compagnie Generale de Geophysique (CGG) United Kingdom | BladeCenter Cluster Xeon 2.8 GHz, Gig-Ethernet IBM | 520 | 2003 | 1732.46 | 2912 |
| 122 | University of Tokyo Japan | SR8000/MPP Hitachi | 1152 | 2001 | 1709.1 | 2074 |
| 123 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 510 | 2003 | 1699.85 | 2856 |
| 124 | SG SGBI France | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 968 | 2003 | 1685.49 | 4646.4 |
| 125 | Media & Entertainment (B) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 500 | 2004 | 1667.23 | 2800 |
| 126 | Leibniz Rechenzentrum Germany | SR8000-F1/168 Hitachi | 168 | 2002 | 1653 | 2016 |
| 127 | Media & Entertainment (A) United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 440 | 2004 | 1652.2 | 2692.8 |
| 128 | Fleet Numerical Meteorology and Oceanography Center United States | xSeries Xeon 2.8 GHz - Myrinet IBM | 478 | 2004 | 1649.71 | 2676.8 |
| 129 | Semiconductor Company (C) United States | xSeries Cluster Xeon 2.8 GHz - Gig-Ethernet IBM | 494 | 2004 | 1647.66 | 2766.4 |
| 130 | Manufacturer (G) United States | eServer pSeries 655 (1.7 GHz Power4+, GigE) IBM | 1152 | 2004 | 1636 | 7833.6 |
| 131 | Manufacturer (G) United States | eServer pSeries 655 (1.7 GHz Power4+, GigE) IBM | 1152 | 2004 | 1636 | 7833.6 |
| 132 | Grid Technology Research Center, AIST Japan | AIST Super Cluster M-64 - AIST Super Cluster M-64, Itanium2 1.3 GHz, Myrinet IBM | 512 | 2004 | 1636 | 2662.4 |
| 133 | CNRS/IDRIS France | eServer pSeries 690 (1.7 GHz Power4+) IBM | 384 | 2004 | 1630 | 2611.2 |
| 134 | Media & Entertainment (A) United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 430 | 2004 | 1614.65 | 2631.6 |
| 135 | Media & Entertainment (A) United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 430 | 2004 | 1614.65 | 2631.6 |
| 136 | Los Alamos National Laboratory United States | ASCI Blue Mountain SGI | 6144 | 1998 | 1608 | 3072 |
| 137 | Veritas DGC United States | Opteron 2.2 GHz, GigE Verari Systems | 992 | 2004 | 1580 | 4364.8 |
| 138 | GX Technology United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 880 | 2003 | 1576.25 | 4224 |
| 139 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz - Gig-Ethernet IBM | 472 | 2004 | 1575.31 | 2643.2 |
| 140 | Geoscience (A) China | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 412 | 2004 | 1547.06 | 2521.44 |
| 141 | Brigham Young University United States | eServer Opteron 2.0 GHz, Myrinet IBM | 512 | 2004 | 1538.75 | 2048 |
| 142 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 406 | 2004 | 1524.53 | 2484.72 |
| 143 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 406 | 2004 | 1524.53 | 2484.72 |
| 144 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 406 | 2004 | 1524.53 | 2484.72 |
| 145 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 406 | 2004 | 1524.53 | 2484.72 |
| 146 | Sandia National Laboratories United States | Vplant Cluster P4 XEON 2.4/2.0 GHz - Myrinet Dell | 660 | 2002 | 1504 | 2963 |
| 147 | Cornell Theory Center United States | PowerEdge 2650 Cluster P4 Xeon 2.4 GHz/MSWindows - GigE Dell | 640 | 2003 | 1503 | 3073 |
| 148 | Sony Online Gaming United States | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 400 | 2004 | 1502 | 2448 |
| 149 | DKRZ - Deutsches Klimarechenzentrum Germany | SX-6/192M24 NEC | 192 | 2003 | 1484 | 1536 |
| 150 | CNRS/IDRIS France | eServer pSeries 655 - 4way (1.7 GHz Power4+) IBM | 384 | 2004 | 1477 | 2611.2 |
| 151 | Verisign United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 800 | 2003 | 1476.94 | 3840 |
| 152 | University of Toronto Canada | PowerRACK-HX dual Xeon 2.4 GHz - SMC GigE Self-made | 528 | 2003 | 1455 | 2534.4 |
| 153 | Cray Inc. United States | Cray X1 Cray Inc. | 124 | 2004 | 1448.42 | 1587.2 |
| 154 | US Army HPC Research Center at NCS United States | Cray X1 Cray Inc. | 124 | 2003 | 1448.42 | 1587.2 |
| 155 | University of Alaska - ARSC United States | Cray X1 Cray Inc. | 124 | 2003 | 1448.42 | 1587.2 |
| 156 | IBM United States | pSeries 690 Turbo 1.7 GHz GigEth IBM | 384 | 2003 | 1424 | 2611.2 |
| 157 | Energy Company (D) United States | Cluster Platform 6000 rx4640-4x136 Itanium2 1.3 GHz, GigE Hewlett-Packard | 544 | 2003 | 1418 | 2828.8 |
| 158 | Naval Oceanographic Office (NAVOCEANO) United States | SP Power3 375 MHz IBM | 1336 | 2000 | 1417 | 2004 |
| 159 | University of Shanghai China | Cluster Platform 3000 DL360G3 Xeon 3.06 GHz, Infiniband Hewlett-Packard | 348 | 2004 | 1401 | 2129.8 |
| 160 | Mississippi State University United States | Maverick - xSeries x335 Cluster, Xeon 3.06 GHz, Infiniband IBM | 384 | 2004 | 1389 | 2350 |
| 161 | Altria Group - Philip Morris Management United States | pSeries 690 Turbo 1.3GHz IBM | 512 | 2004 | 1384 | 2662.4 |
| 162 | CINECA Italy | pSeries 690 Turbo 1.3GHz IBM | 512 | 2002 | 1384 | 2662.4 |
| 163 | Acxiom United States | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 400 | 2004 | 1382 | 2560 |
| 164 | National Institute for Fusion Science Japan | SX-7/160M5 NEC | 160 | 2003 | 1378 | 1412.8 |
| 165 | Raytheon United States | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 364 | 2003 | 1366.82 | 2227.68 |
| 166 | Biotech Company (A) United Kingdom | BladeCenter Xeon 2.8 GHz, Gig-Ethernet IBM | 400 | 2004 | 1335.13 | 2240 |
| 167 | Petroleum Company (F) Netherlands | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 400 | 2004 | 1335.13 | 2240 |
| 168 | Umea University / HPC2N Sweden | HP Opteron 2.2 GHz, Myrinet Hewlett-Packard | 384 | 2004 | 1329 | 1689.6 |
| 169 | Evergrow Grid Sweden | xSeries Xeon 3.06 GHz - Gig-E IBM | 352 | 2004 | 1321.76 | 2154.24 |
| 170 | Semiconductor Company (C) United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 666 | 2004 | 1310.61 | 3196.8 |
| 171 | Consumer Goods Australia | eServer pSeries 690 (1.7 GHz Power4+, GigE) IBM | 352 | 2004 | 1305.33 | 2393.6 |
| 172 | Academy of Mathematics and System Science China | DeepComp 1800 - P4 Xeon 2 GHz - Myrinet lenovo | 512 | 2002 | 1297 | 2048 |
| 173 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz - Gig-Ethernet IBM | 384 | 2004 | 1281.76 | 2150.4 |
| 174 | Financial Services (H) United States | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 336 | 2004 | 1261.68 | 2056.32 |
| 175 | CEG Gramat France | SGI Altix 1.5 GHz SGI | 256 | 2004 | 1258.53 | 1536 |
| 176 | Los Alamos National Laboratory United States | SGI Altix 1.5 GHz SGI | 256 | 2004 | 1258.53 | 1536 |
| 177 | Oak Ridge National Laboratory United States | SGI Altix 1.5 GHz SGI | 256 | 2003 | 1258.53 | 1536 |
| 178 | US Army Research Laboratory (ARL) United States | SGI Altix 1.5 GHz SGI | 256 | 2004 | 1258.53 | 1536 |
| 179 | Public Sector China | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 622 | 2003 | 1255.99 | 2985.6 |
| 180 | DaimlerChrysler Germany | xSeries Xeon 3.06 GHz, Myrinet IBM | 260 | 2004 | 1231.05 | 1591.2 |
| 181 | ECMWF United Kingdom | eServer pSeries 690 (1.7 GHz Power4+) IBM | 288 | 2004 | 1222 | 1958.4 |
| 182 | MTU Aero Engines Germany | xSeries Xeon 3.06 GHz, Myrinet IBM | 256 | 2004 | 1215.31 | 1566.72 |
| 183 | University of Liverpool United Kingdom | PowerEdge 650, 3.06 GHz, Gig Ethernet Dell | 940 | 2003 | 1212 | 5752.8 |
| 184 | Semiconductor Company (C) United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 322 | 2004 | 1209.11 | 1970.64 |
| 185 | Semiconductor Company (F) India | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 574 | 2003 | 1196.41 | 2755.2 |
| 186 | Lawrence Livermore National Laboratory United States | SP Power3 375 MHz 16 way IBM | 1088 | 2001 | 1193 | 1632 |
| 187 | Osaka University Japan | SX-5/128M8 3.2ns NEC | 128 | 2001 | 1192 | 1280 |
| 188 | Petroleum Company (G) Saudia Arabia | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 562 | 2003 | 1181.51 | 2697.6 |
| 189 | CSC (Center for Scientific Computing) Finland | pSeries 690 1.1GHz IBM | 512 | 2002 | 1170 | 2253 |
| 190 | Florida State University United States | pSeries 690 1.1GHz IBM | 512 | 2002 | 1170 | 2253 |
| 191 | Doshisha University Japan | Opteron 1.8 GHz, Gig Ethernet Visual Technology | 512 | 2003 | 1169 | 1843.2 |
| 192 | Government United States | T3E1200 Cray Inc. | 1900 | 2001 | 1166 | 2280 |
| 193 | ERDC MSRC United States | T3E1200/900 Cray Inc. | 1792 | 1999 | 1166 | 1999 |
| 194 | CSAR at the University of Manchester United Kingdom | SGI Altix 1.3 GHz SGI | 256 | 2003 | 1142 | 1331.2 |
| 195 | Institute of Statistical Mathematics Japan | SGI Altix 1.3 GHz SGI | 256 | 2004 | 1142 | 1331.2 |
| 196 | Naval Research Laboratory (NRL) United States | SGI Altix 1.3 GHz SGI | 256 | 2004 | 1142 | 1331.2 |
| 197 | Institute of Space & Astronautical Science (ISAS) Japan | SX-6/128M16 (typeE, 1.778ns) NEC | 128 | 2004 | 1141 | 1152 |
| 198 | University of Houston United States | Cluster Platform 6000 rx2600 Itanium2 1.3 GHz Cluster Hewlett-Packard | 304 | 2003 | 1137 | 1580 |
| 199 | DaimlerChrysler United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 340 | 2004 | 1134.98 | 1904 |
| 200 | Government United States | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 300 | 2004 | 1132 | 1920 |
| 201 | National Supercomputer Centre (NSC) Sweden | Pentium Xeon Cluster 2.2 GHz - SCI 3D Self-made | 400 | 2002 | 1132 | 1760 |
| 202 | Petroleum Company (A) United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 520 | 2003 | 1129.38 | 2496 |
| 203 | UBS Warburg United States | xSeries Xeon 3.06 GHz - Gig-E IBM | 300 | 2004 | 1126.5 | 1836 |
| 204 | The Wellcome Trust Sanger Institute United Kingdom | BladeCenter Xeon 2.8 GHz, Gig-Ethernet IBM | 336 | 2004 | 1121.64 | 1881.6 |
| 205 | Compagnie Generale de Geophysique (CGG) Malaysia | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 512 | 2003 | 1119.44 | 2457.6 |
| 206 | Lockheed Martin United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 512 | 2003 | 1119.44 | 2457.6 |
| 207 | IBM Benchmark and Enablement Center United States | eServer pSeries 655 (1.7 GHz Power4+) IBM | 256 | 2004 | 1107 | 1740.8 |
| 208 | NASA/Goddard Space Flight Center United States | Pentium4 Xeon 2.4 GHz, Myrinet Self-made | 528 | 2003 | 1104 | 2534.4 |
| 209 | Australian Centre for Advanced Computing and Communications Australia | PowerEdge 1750, Pentium4 Xeon 3.06 GHz, GigE Dell | 304 | 2003 | 1095 | 1860.48 |
| 210 | Semiconductor Company (C) United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 488 | 2003 | 1089.65 | 2342.4 |
| 211 | CILEA Italy | Pentium4 Xeon 3.06 GHz, Myrinet Exadron | 256 | 2004 | 1084 | 1566.72 |
| 212 | Nestec S.A. Switzerland | pSeries 690 Turbo 1.3GHz IBM | 400 | 2003 | 1081 | 2080 |
| 213 | Sandia National Laboratories United States | Catalyst - P4 Xeon 3.06 GHz, Infiniband Linux Networx | 256 | 2003 | 1076 | 1566.72 |
| 214 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 320 | 2004 | 1068.26 | 1792 |
| 215 | Compagnie Generale de Geophysique (CGG) United States | PowerEdge 1750, P4 Xeon 3.06 GHz, GigE Dell | 1024 | 2003 | 1068 | 6266.88 |
| 216 | Media & Entertainment (C) United States | eServer pSeries 690 (1.7 GHz Power4+, GigE) IBM | 288 | 2004 | 1068 | 1958.4 |
| 217 | US Army Research Laboratory (ARL) United States | Powell - Pentium4 Xeon 3.06 GHz, Myrinet Linux Networx | 256 | 2003 | 1060 | 1566.72 |
| 218 | Indiana University United States | AVIDD-B+AVIDD-I - xSeries Cluster Xeon 2.4 GHz - Myrinet&Force10 IBM | 384 | 2003 | 1058 | 1843 |
| 219 | General Motors United States | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 320 | 2003 | 1057 | 1792 |
| 220 | Los Alamos National Laboratory United States | Orange - Opteron 1.6 GHz, Infiniband Linux Networx | 512 | 2003 | 1053 | 1638 |
| 221 | University of Kentucky United States | Integrity Superdome, 1.5 GHz, HFabric Hewlett-Packard | 220 | 2003 | 1049 | 1320 |
| 222 | University of Toronto Canada | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 448 | 2003 | 1040 | 2150.4 |
| 223 | XinJiang Oil China | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 448 | 2003 | 1040 | 2150.4 |
| 224 | Applera/Celera Genomics United States | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 225 | HLRN at Universitaet Hannover / RRZN Germany | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 226 | HLRN at ZIB/Konrad Zuse-Zentrum fuer Informationstechnik Germany | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 227 | Lawrence Livermore National Laboratory United States | Emperor - Pentium4 Xeon 2.8 GHz Cluster - Quadrics Promicro/Quadrics | 256 | 2003 | 1036 | 1433.6 |
| 228 | Lawrence Livermore National Laboratory United States | Adelie - Pentium4 Xeon 2.8 GHz Cluster - Quadrics Promicro/Quadrics | 256 | 2003 | 1036 | 1433.6 |
| 229 | Bull France | NovaScale5160, Itanium2 1.3 GHz, Quadrics Bull SA | 256 | 2004 | 1027 | 1331.2 |
| 230 | University of Utah United States | Arches AMD 1.4 GHz, Myrinet Angstrom Microsystems | 500 | 2004 | 1017 | 1400 |
| 231 | Bio Informatics Institute Singapore | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 1015.5 | 1638.4 |
| 232 | Siemens Germany | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 1015.5 | 1638.4 |
| 233 | University of Georgia United States | Cluster Platform 3000 DL140, Pentium4 Xeon 3.2 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 1015.5 | 1638.4 |
| 234 | Life Science (A) United Kingdom | BladeCenter Xeon 2.8 GHz, Gig-Ethernet IBM | 304 | 2004 | 1014.89 | 1702.4 |
| 235 | Seoul National University Korea, South | Pegasus P4 Xeon Cluster 2.2/2.4/2.8 GHz - Giganet - MSWindows Self-made | 400 | 2002 | 1011 | 1843 |
| 236 | Financial Services Company (E) United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 440 | 2003 | 1009.17 | 2112 |
| 237 | Argonne National Laboratory United States | Jazz - LCRC Xeon 2.4 GHz - Myrinet Linux Networx | 361 | 2002 | 1007 | 1732.8 |
| 238 | Japan Atomic Energy Research Institute Japan | AlphaServer SC40, 833 MHz Hewlett-Packard | 812 | 2002 | 1007 | 1352.8 |
| 239 | AGIP Italy | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 260 | 2004 | 1004 | 1664 |
| 240 | Boeing United States | Pentium4 Xeon 2.8 GHz, Myrinet Linux Networx | 256 | 2004 | 1004 | 1433.6 |
| 241 | Boeing United States | Pentium4 Xeon 2.8 GHz, Myrinet Linux Networx | 256 | 2004 | 1004 | 1433.6 |
| 242 | Commissariat a l'Energie Atomique (CEA) France | AlphaServer SC45, 1.25 GHz Hewlett-Packard | 512 | 2003 | 1004 | 1280 |
| 243 | National Center for High Performance Computing Taiwan | Pentium4 Xeon, 2.8 GHz, Gig Ethernet Self-made | 300 | 2003 | 1001.54 | 1680 |
| 244 | Sandia National Laboratories United States | CPlant/Ross Cluster Self-made | 1800 | 2002 | 996.9 | 1782.5 |
| 245 | PETROBRAS Brazil | Cluster Platform 3000 DL140, Pentium4 Xeon 3.2 GHz, Myrinet Hewlett-Packard | 250 | 2004 | 992 | 1600 |
| 246 | PETROBRAS Brazil | Cluster Platform 3000 DL140, Pentium4 Xeon 3.2 GHz, Myrinet Hewlett-Packard | 250 | 2004 | 992 | 1600 |
| 247 | PETROBRAS Brazil | Cluster Platform 3000 DL140, Pentium4 Xeon 3.2 GHz, Myrinet Hewlett-Packard | 250 | 2004 | 992 | 1600 |
| 248 | PETROBRAS Brazil | Cluster Platform 3000 DL140, Pentium4 Xeon 3.2 GHz, Myrinet Hewlett-Packard | 250 | 2004 | 992 | 1600 |
| 249 | Boeing United States | Pentium Xeon 2.66 GHz, Myrinet Linux Networx | 256 | 2004 | 987.9 | 1361.9 |
| 250 | Automotive Manufacturer (F) Italy | eServer Opteron 2.0 GHZ, Gig-E IBM | 512 | 2004 | 987.1 | 2048 |
| 251 | NEC Fuchu Plant Japan | SX-6/128M16 NEC | 128 | 2002 | 982 | 1024 |
| 252 | Digital Media Company (B) United States | Cluster Platform 3000 DL140 Xeon 3.06 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 971 | 1566.7 |
| 253 | Digital Media Company (B) United States | Cluster Platform 3000 DL140 Xeon 3.06 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 971 | 1566.7 |
| 254 | Digital Media Company (B) United States | Cluster Platform 3000 DL140 Xeon 3.06 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 971 | 1566.7 |
| 255 | Digital Media Company (B) United States | Cluster Platform 3000 DL360G3 Xeon 3.06 GHz, Myrinet Hewlett-Packard | 256 | 2004 | 971 | 1566.7 |
| 256 | Itochu Techno-Science Corp. Japan | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 192 | 2004 | 969.1 | 1152 |
| 257 | Jeis Tokyo Shiten Japan | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 192 | 2004 | 969.1 | 1152 |
| 258 | Manufacturing Company (F) Italy | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 192 | 2004 | 969.1 | 1152 |
| 259 | Nihon Synopsis Japan | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 192 | 2004 | 969.1 | 1152 |
| 260 | SBM Gates Arrow Com. United States | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 192 | 2004 | 969.1 | 1152 |
| 261 | Government United States | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 240 | 2004 | 967 | 1536 |
| 262 | State Farm United States | eServer pSeries 655 (1.7 GHz Power4+, GigE) IBM | 320 | 2004 | 962.353 | 2176 |
| 263 | Geoscience (C) India | xSeries Xeon 3.06 GHz - Gig-E IBM | 256 | 2004 | 961.28 | 1566.72 |
| 264 | Institute of Mathematical Sciences, C.I.T Campus India | KABRU - Pentium Xeon Cluster 2.4 GHz - SCI 3D IMSc-Netweb-Summation | 288 | 2004 | 959 | 1382.4 |
| 265 | IBM Benchmark and Enablement Center United States | eServer pSeries 690 (1.7 GHz Power4+, GigE) IBM | 256 | 2004 | 949.333 | 1740.8 |
| 266 | Compagnie Generale de Geophysique (CGG) United Kingdom | xSeries Cluster Xeon 2.4 GHz - Myrinet IBM | 320 | 2003 | 949.009 | 1536 |
| 267 | Geoscience (B) India | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 252 | 2004 | 946.26 | 1542.24 |
| 268 | Geoscience (B) India | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 252 | 2004 | 946.26 | 1542.24 |
| 269 | Rice University United States | Cluster Platform 6000 zx6000 Itanium2 1.5 GHz, Myrinet Hewlett-Packard | 196 | 2004 | 943 | 1176 |
| 270 | PETROBRAS Brazil | Fire V60 Cluster, 2.8 GHz, Gig E Sun Microsystems | 340 | 2004 | 939.635 | 1904 |
| 271 | Government United States | Cray X1 Cray Inc. | 80 | 2004 | 937 | 1024 |
| 272 | University of Queensland Australia | SGI Altix 1.3 GHz SGI | 208 | 2003 | 936.837 | 1081.6 |
| 273 | Ohio Supercomputer Center United States | P4 Xeon 2.4 GHz, Infiniband Advanced Computing/Voltaire | 256 | 2004 | 933.1 | 1228.8 |
| 274 | Geoscience (C) United Kingdom | xSeries Xeon 3.06 GHz - Gig-E IBM | 248 | 2004 | 931.24 | 1517.76 |
| 275 | UCSD/San Diego Supercomputer Center United States | SP Power3 375 MHz 8 way IBM | 1152 | 2000 | 929 | 1728 |
| 276 | United Kingdom Meteorological Office United Kingdom | SX-6/120M15 NEC | 120 | 2003 | 927.6 | 960 |
| 277 | United Kingdom Meteorological Office United Kingdom | SX-6/120M15 NEC | 120 | 2003 | 927.6 | 960 |
| 278 | AMD Developer Center United States | Opteron 2.0 GHz, Infiniband Appro International | 288 | 2004 | 922.8 | 1152 |
| 279 | Pennsylvania State University United States | PowerEdge 1750, Pentium4 Xeon 3.06 GHz, GigE Dell | 256 | 2003 | 922.105 | 1566.72 |
| 280 | Chevron United States | Cluster Platform 3000 DL360G3, Xeon 3.2 GHz, Myrinet Hewlett-Packard | 228 | 2004 | 919 | 1459.2 |
| 281 | High Energy Accelerator Research Organization /KEK Japan | SR8000-F1/100 Hitachi | 100 | 2000 | 917 | 1200 |
| 282 | Scripps Institution of Oceanography United States | xSeries Xeon 2.8 GHz, NPACI-ROCKS, Myrinet IBM | 256 | 2004 | 916.5 | 1433.6 |
| 283 | Government United States | Cluster Platform 3000 DL380G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 260 | 2003 | 902 | 1456 |
| 284 | Bio Informatics Institute Singapore | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 285 | Boeing United States | Cluster Platform 3000 DL380G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 286 | Hewlett-Packard United States | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 287 | Boston University School of Medicine United States | BladeCenter Xeon 2.8 GHz, Gig-Ethernet IBM | 268 | 2004 | 894.797 | 1500.8 |
| 288 | Universitaet Aachen/RWTH Germany | Fire 15k/6800 Cluster Sun Microsystems | 672 | 2003 | 891.4 | 1209.6 |
| 289 | VW (Volkswagen AG) Germany | NEC Opteron Cluster, 2.0 GHz, GigEthernet NEC | 360 | 2004 | 891 | 1440 |
| 290 | Maui High-Performance Computing Center (MHPCC) United States | SP Power3 375 MHz 16 way IBM | 812 | 2001 | 891 | 1218 |
| 291 | University of Nebraska United States | Prairiefire Opteron 2.2 GHz, Myrinet Atipa Technology | 256 | 2004 | 888.5 | 1126.4 |
| 292 | Maui High-Performance Computing Center (MHPCC) United States | pSeries 690 Turbo 1.3GHz IBM | 320 | 2002 | 887.3 | 1664 |
| 293 | Sandia National Laboratories United States | Rose - PowerEdge 1750, Pentium4 Xeon 3.06 GHz, Infiniband Dell | 192 | 2004 | 882 | 1175 |
| 294 | Pennsylvania State University United States | LION-XL - PowerEdge 2650 Cluster P4 Xeon 2.4 GHz - Quadrics Dell | 256 | 2003 | 877.9 | 1228.8 |
| 295 | University of Tokyo Japan | SR8000/128 Hitachi | 128 | 1999 | 873 | 1024 |
| 296 | Pennsylvania State University United States | Fire V60 Cluster, 2.8 GHz, Gig Ethernet Sun Microsystems | 320 | 2003 | 872.269 | 1792 |
| 297 | ERDC MSRC United States | emerald - AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 298 | Hewlett-Packard United States | AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 299 | Wright-Patterson Air Force Base/DoD ASC United States | AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 300 | Compagnie Generale de Geophysique (CGG) Indonesia | BladeCenter Cluster, Xeon 2.8 GHz, Gig-Ethernet IBM | 256 | 2003 | 854.767 | 1433.6 |