| Rank | Site | Computer | Cores | Year | Rmax | Rpeak | | 101 | Silicon Graphics United States | SGI Altix 1.3 GHz SGI | 256 | 2003 | 1142 | 1331.2 |
| 102 | University of Houston United States | Cluster Platform 6000 rx2600 Itanium2 1.3 GHz Cluster Hewlett-Packard | 304 | 2003 | 1137 | 1580 |
| 103 | National Supercomputer Centre (NSC) Sweden | Pentium Xeon Cluster 2.2 GHz - SCI 3D Self-made | 400 | 2002 | 1132 | 1760 |
| 104 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 580 | 2003 | 1114.61 | 3248 |
| 105 | Semiconductor Company (F) India | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 574 | 2003 | 1105.96 | 2755.2 |
| 106 | NASA/Goddard Space Flight Center United States | Pentium4 Xeon 2.4 GHz, Myrinet Self-made | 528 | 2003 | 1104 | 2534.4 |
| 107 | Sony Pictures Imageworks United States | xSeries Cluster Xeon 3.06 GHz - Gig-E IBM | 568 | 2003 | 1097.31 | 3476.16 |
| 108 | Australian Centre for Advanced Computing and Communications Australia | PowerEdge 1750, Pentium4 Xeon 3.06 GHz, GigE Dell | 304 | 2003 | 1095 | 1860.48 |
| 109 | Petroleum Company (G) Saudia Arabia | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 562 | 2003 | 1088.65 | 2697.6 |
| 110 | Nestec S.A. Switzerland | pSeries 690 Turbo 1.3GHz IBM | 400 | 2003 | 1081 | 2080 |
| 111 | Sandia National Laboratories United States | Catalyst - P4 Xeon 3.06 GHz, Infiniband Linux Networx | 256 | 2003 | 1076 | 1566.72 |
| 112 | Compagnie Generale de Geophysique (CGG) United States | PowerEdge 1750, P4 Xeon 3.06 GHz, GigE Dell | 1024 | 2003 | 1068 | 6266.88 |
| 113 | US Army Research Laboratory (ARL) United States | Powell - Pentium4 Xeon 3.06 GHz, Myrinet Linux Networx | 256 | 2003 | 1060 | 1566.72 |
| 114 | Indiana University United States | AVIDD-B+AVIDD-I - xSeries Cluster Xeon 2.4 GHz - Myrinet&Force10 IBM | 384 | 2003 | 1058 | 1843 |
| 115 | General Motors United States | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 320 | 2003 | 1057 | 1792 |
| 116 | Los Alamos National Laboratory United States | Orange - Opteron 1.6 GHz, Infiniband Linux Networx | 512 | 2003 | 1053 | 1638 |
| 117 | University of Kentucky United States | Integrity Superdome, 1.5 GHz, HFabric Hewlett-Packard | 220 | 2003 | 1049 | 1320 |
| 118 | Applera/Celera Genomics United States | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 119 | HLRN at Universitaet Hannover / RRZN Germany | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 120 | HLRN at ZIB/Konrad Zuse-Zentrum fuer Informationstechnik Germany | pSeries 690 Turbo 1.3GHz IBM | 384 | 2002 | 1038 | 1996.8 |
| 121 | Lawrence Livermore National Laboratory United States | Emperor - Pentium4 Xeon 2.8 GHz Cluster - Quadrics Promicro/Quadrics | 256 | 2003 | 1036 | 1433.6 |
| 122 | Lawrence Livermore National Laboratory United States | Adelie - Pentium4 Xeon 2.8 GHz Cluster - Quadrics Promicro/Quadrics | 256 | 2003 | 1036 | 1433.6 |
| 123 | Compagnie Generale de Geophysique (CGG) United Kingdom | BladeCenter Cluster Xeon 2.8 GHz, Gig-Ethernet IBM | 520 | 2003 | 1028.08 | 2912 |
| 124 | Petroleum Company (A) United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 520 | 2003 | 1028.08 | 2496 |
| 125 | Compagnie Generale de Geophysique (CGG) Malaysia | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 512 | 2003 | 1016.54 | 2457.6 |
| 126 | Lockheed Martin United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 512 | 2003 | 1016.54 | 2457.6 |
| 127 | Semiconductor Company (C) United States | xSeries Xeon 2.8 GHz, Gig-Ethernet IBM | 510 | 2003 | 1013.65 | 2856 |
| 128 | Seoul National University Korea, South | Pegasus P4 Xeon Cluster 2.2/2.4/2.8 GHz - Giganet - MSWindows Self-made | 400 | 2002 | 1011 | 1843 |
| 129 | Argonne National Laboratory United States | Jazz - LCRC Xeon 2.4 GHz - Myrinet Linux Networx | 361 | 2002 | 1007 | 1732.8 |
| 130 | Japan Atomic Energy Research Institute Japan | AlphaServer SC40, 833 MHz Hewlett-Packard | 812 | 2002 | 1007 | 1352.8 |
| 131 | Commissariat a l'Energie Atomique (CEA) France | AlphaServer SC45, 1.25 GHz Hewlett-Packard | 512 | 2003 | 1004 | 1280 |
| 132 | Sandia National Laboratories United States | CPlant/Ross Cluster Self-made | 1800 | 2002 | 996.9 | 1782.5 |
| 133 | NEC Fuchu Plant Japan | SX-6/128M16 NEC | 128 | 2002 | 982 | 1024 |
| 134 | Semiconductor Company (C) United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 488 | 2003 | 981.923 | 2342.4 |
| 135 | National Center for High Performance Computing Taiwan | Pentium4 Xeon, 2.8 GHz, Gig Ethernet Self-made | 300 | 2003 | 973 | 1680 |
| 136 | University of Queensland Australia | SGI Altix 1.3 GHz SGI | 208 | 2003 | 936.837 | 1081.6 |
| 137 | UCSD/San Diego Supercomputer Center United States | SP Power3 375 MHz 8 way IBM | 1152 | 2000 | 929 | 1728 |
| 138 | United Kingdom Meteorological Office United Kingdom | SX-6/120M15 NEC | 120 | 2003 | 927.6 | 960 |
| 139 | United Kingdom Meteorological Office United Kingdom | SX-6/120M15 NEC | 120 | 2003 | 927.6 | 960 |
| 140 | University of Toronto Canada | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 448 | 2003 | 924.231 | 2150.4 |
| 141 | XinJiang Oil China | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 448 | 2003 | 924.231 | 2150.4 |
| 142 | Pennsylvania State University United States | PowerEdge 1750, Pentium4 Xeon 3.06 GHz, GigE Dell | 256 | 2003 | 922.105 | 1566.72 |
| 143 | Sandia National Laboratories United States | PowerEdge 1750, Pentium4 Xeon 3.06 GHz, GigE Dell | 256 | 2003 | 922.105 | 1566.72 |
| 144 | Compagnie Generale de Geophysique (CGG) United Kingdom | xSeries Cluster Xeon 2.4 GHz - Myrinet IBM | 320 | 2003 | 921.491 | 1536 |
| 145 | High Energy Accelerator Research Organization /KEK Japan | SR8000-F1/100 Hitachi | 100 | 2000 | 917 | 1200 |
| 146 | Financial Services Company (E) United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 440 | 2003 | 912.692 | 2112 |
| 147 | Government United States | Cluster Platform 3000 DL380G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 260 | 2003 | 902 | 1456 |
| 148 | Bio Informatics Institute Singapore | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 149 | Boeing United States | Cluster Platform 3000 DL380G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 150 | Hewlett-Packard United States | Cluster Platform DL360G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 256 | 2003 | 899.3 | 1433.6 |
| 151 | Universitaet Aachen/RWTH Germany | Fire 15k/6800 Cluster Sun Microsystems | 672 | 2003 | 891.4 | 1209.6 |
| 152 | Maui High-Performance Computing Center (MHPCC) United States | SP Power3 375 MHz 16 way IBM | 812 | 2001 | 891 | 1218 |
| 153 | Maui High-Performance Computing Center (MHPCC) United States | pSeries 690 Turbo 1.3GHz IBM | 320 | 2002 | 887.3 | 1664 |
| 154 | Pennsylvania State University United States | LION-XL - PowerEdge 2650 Cluster P4 Xeon 2.4 GHz - Quadrics Dell | 256 | 2003 | 877.9 | 1228.8 |
| 155 | University of Tokyo Japan | SR8000/128 Hitachi | 128 | 1999 | 873 | 1024 |
| 156 | Pennsylvania State University United States | Fire V60 Cluster, 2.8 GHz, Gig Ethernet Sun Microsystems | 320 | 2003 | 872.269 | 1792 |
| 157 | ERDC MSRC United States | emerald - AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 158 | Hewlett-Packard United States | AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 159 | Wright-Patterson Air Force Base/DoD ASC United States | AlphaServer SC45, 1 GHz Hewlett-Packard | 512 | 2002 | 862.2 | 1024 |
| 160 | NASA/Ames Research Center/NAS United States | ORIGIN 3000 600 MHz SGI | 1024 | 2002 | 852.9 | 1228.8 |
| 161 | Los Alamos National Laboratory United States | Grendels - Grendels P4 Cluster 2.4 GHz - Myrinet Linux Networx | 252 | 2003 | 840.5 | 1209.6 |
| 162 | Petroleum Company (B) United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 392 | 2003 | 838.927 | 1881.6 |
| 163 | Shenzhen University China | DeepSuper-21C, P4 Xeon 3.06/2.8 GHz, Myrinet Tsinghua University, ShenZhen University | 256 | 2003 | 830.1 | 1500.16 |
| 164 | Australian Partnership for Advanced Computing (APAC) Australia | AlphaServer SC45, 1 GHz Hewlett-Packard | 508 | 2002 | 825.5 | 1016 |
| 165 | Universitaet Heidelberg - IWR Germany | HELICS AMD 1.4 GHz - Myrinet Megware | 512 | 2002 | 825 | 1433.6 |
| 166 | Mississippi State University United States | xSeries Cluster Xeon 3.06 GHz - Gig-E IBM | 384 | 2003 | 822.853 | 2350.08 |
| 167 | IN2P3 France | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 384 | 2003 | 822.853 | 1843.2 |
| 168 | PDO Oman | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 384 | 2003 | 822.853 | 1843.2 |
| 169 | Government United States | T3E900 Cray Inc. | 1324 | 1997 | 815 | 1191.6 |
| 170 | Sony Data United Kingdom | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 376 | 2003 | 806.78 | 1804.8 |
| 171 | UCSD/San Diego Supercomputer Center United States | TeraGrid Cluster Itanium 2 1 GHz - Myrinet IBM | 252 | 2003 | 798.3 | 1008 |
| 172 | Charles Schwab United States | SP Power3 375 MHz IBM | 768 | 2000 | 795 | 1152 |
| 173 | Rutgers University, Department of Physics & Astronomy United States | AMD AthlonMP Cluster 1.65 GHz Self-made | 512 | 2003 | 794 | 1690 |
| 174 | Institute for Materials Research/Tohoku University Japan | SR8000-G1/64 Hitachi | 64 | 2001 | 790.7 | 921.6 |
| 175 | GSIC Center, Tokyo Institute of Technology Japan | Presto III Athlon 1.6 GHz Self-made | 486 | 2002 | 788.8 | 1555.2 |
| 176 | Scalable Systems Group, Dell Computer United States | PowerEdge 2650, P4 Xeon 3.06/2.4 GHz, Myrinet Dell | 252 | 2003 | 787.1 | 1375.92 |
| 177 | Brigham Young University United States | xSeries Cluster Xeon 2.4 GHz - Myrinet IBM | 256 | 2003 | 784.982 | 1228.8 |
| 178 | South Australian Partnership for Advanced Computing (SAPAC) Australia | xSeries Cluster Xeon 2.4 GHz - Myrinet IBM | 256 | 2003 | 784.982 | 1228.8 |
| 179 | Raytheon United States | BladeCenter Xeon 3.06 GHz, Gig-Ethernet IBM | 364 | 2003 | 782.67 | 2227.68 |
| 180 | Ohio Supercomputer Center United States | Cluster Platform 6000 zx6000 Itanium2 900 MHz, Myrinet Hewlett-Packard | 256 | 2003 | 761.9 | 921.6 |
| 181 | Los Alamos National Laboratory United States | Space Simulator, P4 2.53 GHz - GigEth Self-made | 288 | 2002 | 757.1 | 1457 |
| 182 | EDS/ Adam Opel AG Germany | pSeries 690 Turbo 1.3GHz IBM | 264 | 2003 | 755 | 1372.8 |
| 183 | North Carolina Supercomputing Center (NCSC) United States | SP Power3 375 MHz IBM | 720 | 2000 | 741 | 1080 |
| 184 | IBM United States | pSeries 690 Turbo 1.3GHz IBM | 256 | 2002 | 736.6 | 1331.2 |
| 185 | IBM United States | pSeries 690 Turbo 1.3GHz IBM | 256 | 2002 | 736.6 | 1331.2 |
| 186 | National Center for High Performance Computing Taiwan | pSeries 690 Turbo 1.3GHz IBM | 256 | 2002 | 736.6 | 1331.2 |
| 187 | Swiss Scientific Computing Center (CSCS) Switzerland | pSeries 690 Turbo 1.3GHz IBM | 256 | 2002 | 736.6 | 1331.2 |
| 188 | LASG/Institute of Atmospheric Physics, CAS China | DeepComp 1800 - P4 Xeon 2.4 GHz - Myrinet lenovo | 256 | 2002 | 735.8 | 1228 |
| 189 | Joint Supercomputer Center Russia | MVS1000M EV67 667 MHz Self-made | 768 | 2002 | 734.6 | 1024 |
| 190 | Boeing United States | Cluster Platform 3000 DL380G3, Pentium4 Xeon 2.8 GHz, Myrinet Hewlett-Packard | 192 | 2003 | 731.1 | 1075.2 |
| 191 | University of Tsukuba Japan | VPP5000/80 Fujitsu | 80 | 2001 | 730 | 768 |
| 192 | Total Exporation Production France | Altix 3700 900 MHz SGI | 256 | 2003 | 727.4 | 921.6 |
| 193 | Oak Ridge National Laboratory United States | SP Power3 375 MHz IBM | 704 | 2000 | 723 | 1056 |
| 194 | Compagnie Generale de Geophysique (CGG) Malaysia | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 332 | 2003 | 718.377 | 1593.6 |
| 195 | NCSA United States | pSeries 690 Turbo 1.3GHz GigEth IBM | 384 | 2003 | 708 | 1996.8 |
| 196 | ERDC MSRC United States | Cray X1 Cray Inc. | 60 | 2003 | 706.35 | 768 |
| 197 | Government United States | Cray X1 Cray Inc. | 60 | 2003 | 706.35 | 768 |
| 198 | Texas Advanced Computing Center/Univ. of Texas United States | Longhorn - pSeries p690/p655 1.3GHz IBM | 224 | 2002 | 704.8 | 1164.8 |
| 199 | Vanderbilt University United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 324 | 2003 | 702.303 | 1555.2 |
| 200 | Media & Entertainment (C) United States | pSeries 690 Turbo 1.3 GHz GigEth IBM | 376 | 2003 | 700.637 | 1955.2 |
| 201 | UCSD/Cal-IT^2/SDSC United States | Rocks V60x Cluster 2.8 GHz, Gig Ethernet Sun Microsystems | 256 | 2003 | 699 | 1433.6 |
| 202 | Cambridge University - COSMOS United Kingdom | SGI Altix 1.3 GHz SGI | 152 | 2003 | 697.481 | 790.4 |
| 203 | Japan Meteorological Agency Japan | SR8000-E1/80 Hitachi | 80 | 2000 | 691.3 | 768 |
| 204 | Los Alamos National Laboratory/ACL United States | ORIGIN 2000 250 MHz SGI | 2048 | 1999 | 690.9 | 1024 |
| 205 | ERDC MSRC United States | AlphaServer SC40, 833 MHz Hewlett-Packard | 512 | 2002 | 690.9 | 853 |
| 206 | American Museum of Natural History United States | Demeter - P4 Xeon 2.6 Ghz - Myrinet Linux Labs | 240 | 2003 | 680.3 | 1248 |
| 207 | COLSA United States | pSeries 690 Turbo 1.3GHz IBM | 240 | 2002 | 680 | 1248 |
| 208 | US Department of the Treasury United States | pSeries 690 Turbo 1.3GHz IBM | 240 | 2002 | 680 | 1248 |
| 209 | Fermi National Accelerator Laboratory United States | P4 Xeon Cluster 2.4 GHz - Myrinet Self-made | 256 | 2003 | 671.3 | 1228.8 |
| 210 | CSAR at the University of Manchester United Kingdom | T3E1200 Cray Inc. | 812 | 2000 | 671 | 974.4 |
| 211 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 212 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 213 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Gig Ethernet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 214 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 215 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 216 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Gig Ethernet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 217 | Petroleum Company (G) Saudia Arabia | Fire V60 Cluster, 3.06 GHz, Gig Ethernet Sun Microsystems | 256 | 2003 | 656.7 | 1566.72 |
| 218 | Sun United States | Fire V60 Cluster, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1433.6 |
| 219 | University of Delaware United States | Fire V60 Cluster, Myrinet Sun Microsystems | 256 | 2003 | 656.7 | 1433.6 |
| 220 | University of Queensland Australia | Fire V60 Cluster, Gig Ethernet Sun Microsystems | 256 | 2003 | 656.7 | 1433.6 |
| 221 | Fraunhofer Institut, Ernst-Mach Institute Germany | xSeries Cluster Xeon 2.0 GHz - Myrinet IBM | 256 | 2003 | 654.7 | 1024 |
| 222 | CBRC - Tsukuba Advanced Computing Center - TACC/AIST Japan | Magi Cluster PIII 933 MHz NEC | 1040 | 2001 | 654 | 970 |
| 223 | Pacific Northwest National Laboratory United States | SGI Altix 1.5 GHz SGI | 128 | 2003 | 651.7 | 768 |
| 224 | Silicon Graphics United States | SGI Altix 1.5 GHz SGI | 128 | 2003 | 651.7 | 768 |
| 225 | Boeing - Rocketdyne Power and Propulsion United States | PowerEdge 2650 Cluster P4 Xeon 2.4 GHz - GigE Dell | 264 | 2003 | 650 | 1267.2 |
| 226 | BMW AG Germany | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 128 | 2003 | 642.9 | 768 |
| 227 | Centro de Supercomputación de Galicia Spain | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 128 | 2003 | 642.9 | 768 |
| 228 | Hewlett-Packard United States | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 128 | 2003 | 642.9 | 768 |
| 229 | National Center for High Performance Computing Taiwan | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 128 | 2003 | 642.9 | 768 |
| 230 | Societa Interbancaria per I'Automazione Italy | Integrity Superdome, 1.5 GHz, HPlex Hewlett-Packard | 128 | 2003 | 642.9 | 768 |
| 231 | University of Gdansk, CI Task Poland | Holk - Itanium2 1.3 GHz, Gig Ethernet Optimus | 256 | 2003 | 641.6 | 1331.2 |
| 232 | Compagnie Generale de Geophysique (CGG) Indonesia | BladeCenter Cluster, Xeon 2.8 GHz, Gig-Ethernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 233 | Hyundai Korea, South | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 234 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 235 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 236 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 237 | IBM - Deep Computing Capacity on Demand Center United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 238 | Lockheed Martin United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 239 | Petroleum Company (A) United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 240 | University of Hong Kong Hong Kong | HPCPower - xSeries Xeon 2.8 GHz, GigEthernet IBM | 256 | 2003 | 638.8 | 1433.6 |
| 241 | E*Trade United States | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 290 | 2003 | 633.992 | 1392 |
| 242 | Victorian Partnership for Advanced Computing (VPAC) Australia | xSeries Cluster Xeon 2.8 GHz - Myrinet IBM | 192 | 2003 | 629.7 | 1075 |
| 243 | Institute of High Performance Computing (IHPC) Singapore | pSeries 690 Turbo 1.3GHz IBM | 224 | 2002 | 623.9 | 1164.8 |
| 244 | Manufacturer (G) United States | pSeries 690 Turbo 1.3GHz IBM | 224 | 2002 | 623.9 | 1164.8 |
| 245 | IBM United States | pSeries 690 1.1GHz IBM | 256 | 2003 | 623 | 1126.4 |
| 246 | AMD Developer Center United States | Morpheus - Opteron 1.8 GHz, Myrinet Verari Systems | 256 | 2003 | 621.2 | 921.6 |
| 247 | University of Utah United States | PowerEdge 2650 Cluster P4 Xeon 2.4 GHz - GigE Dell | 256 | 2002 | 618.3 | 1228.8 |
| 248 | Real World Computing (RWCP)/Tsukuba Research Center Japan | SCore IIIe/PIII 933 MHz Self-made | 1024 | 2001 | 618.3 | 955.4 |
| 249 | Meteorological Service of Canada (MSC) Canada | SX-6/80M10 NEC | 80 | 2002 | 616.9 | 640 |
| 250 | St. Jude Children's Research Hospital United States | BladeCenter Cluster Xeon 2.4 GHz, Gig-Ethernet IBM | 280 | 2003 | 613.9 | 1344 |
| 251 | Hewlett-Packard United States | Cluster Platform 6000 rx2600 Itanium2 1.5 GHz, Quadrics Hewlett-Packard | 128 | 2003 | 609.2 | 768 |
| 252 | University of Oklahoma United States | P4 Xeon Cluster 2 GHz - Myrinet Aspen Systems Inc. | 270 | 2002 | 606.9 | 1080 |
| 253 | Galileo International LLC United States | xSeries Xeon 2.8 GHz, GigEthernet IBM | 240 | 2003 | 604.062 | 1344 |
| 254 | IBM United States | pSeries 690 Turbo 1.5 Ghz GigEth IBM | 176 | 2003 | 596.933 | 1056 |
| 255 | University of Calgary Canada | xSeries Cluster Xeon 2.4 GHz - Gig-E IBM | 278 | 2003 | 596.283 | 1334.4 |
| 256 | Naval Research Laboratory (NRL) United States | SGI Altix 1.3 GHz SGI | 128 | 2003 | 594.9 | 665.6 |
| 257 | Center for Development of Advanced Computing (C-DAC) India | PARAM Padma Cluster - pSeries 630 1.1/1.0GHz - PARAMNet C-DAC | 280 | 2003 | 594.2 | 1132.8 |
| 258 | NCSA United States | Netfinity Cluster PIII 1 GHz - Myrinet IBM | 1024 | 2001 | 594 | 1024 |
| 259 | University of Texas, Health Science Center at Houston United States | PowerEdge 1750, Pentium4 Xeon 2.8 GHz, GigE Dell | 180 | 2003 | 593.266 | 1008 |
| 260 | Consumer Industry Germany | xSeries Xeon 2.8 GHz, GigEthernet IBM | 234 | 2003 | 591.073 | 1310.4 |
| 261 | W. Karmann GmbH Germany | xSeries Xeon 2.8 GHz, GigEthernet IBM | 234 | 2003 | 591.073 | 1310.4 |
| 262 | Wachovia Corporation United States | pSeries 690 Turbo 1.3GHz IBM | 208 | 2002 | 591 | 1081.6 |
| 263 | CNRS/IDRIS France | pSeries 690 Turbo 1.3 GHz, GigEth IBM | 256 | 2002 | 590.2 | 1331.2 |
| 264 | Postbank Germany | pSeries 690 Turbo 1.3 GHz, GigEth IBM | 256 | 2002 | 590.2 | 1331.2 |
| 265 | Linux Networx United States | Pentium4 Xeon 3.06 GHz, Myrinet Linux Networx | 144 | 2003 | 585.6 | 881.28 |
| 266 | Commissariat a l'Energie Atomique (CEA) France | AlphaServer SC45, 1.25 GHz Hewlett-Packard | 288 | 2003 | 581.6 | 720 |
| 267 | Sprint PCS United States | SP Power3 375 MHz 16 way IBM | 528 | 2002 | 579 | 792 |
| 268 | Hewlett Packard Germany | Cluster Platform 6000 rx2600 Itanium2 1.5 GHz, Myrinet Hewlett-Packard | 128 | 2003 | 579 | 768 |
| 269 | Financial Services (C) United States | pSeries 690 Turbo 1.3 GHz GigEth IBM | 248 | 2003 | 577.1 | 1289.6 |
| 270 | University of Tokyo/Institute for Solid State Physics Japan | SR8000-F1/60 Hitachi | 60 | 2000 | 577 | 720 |
| 271 | Naval Research Laboratory (NRL) United States | 1200X P4 Xeon 2.2 GHz - Myrinet Appro International | 256 | 2002 | 575 | 1126.4 |
| 272 | PIK Germany | pSeries 655 1.1GHz IBM | 240 | 2003 | 574.9 | 1056 |
| 273 | Telecom Italia Italy | pSeries 690 Turbo 1.3GHz IBM | 200 | 2002 | 574 | 1040 |
| 274 | Government United States | AlphaServer SC45, 1.25 GHz Hewlett-Packard | 276 | 2003 | 572.7 | 690 |
| 275 | University of Zurich - Institute for Theoretical Physics Switzerland | zBox, AMD AthlonMP 1.8 GHz - SCI 2D Self-made | 288 | 2003 | 570.1 | 1036.8 |
| 276 | IBM Thomas J. Watson Research Center United States | SP Power3 375 MHz 16 way IBM | 520 | 2002 | 570 | 780 |
| 277 | Japan Atomic Energy Research Institute Japan | VPP5000/64 Fujitsu | 64 | 2001 | 563 | 614.4 |
| 278 | Kyushu University Japan | VPP5000/64 Fujitsu | 64 | 2000 | 563 | 614.4 |
| 279 | Meteo-France France | VPP5000/64 Fujitsu | 64 | 2003 | 563 | 614.4 |
| 280 | Petroleum Company (G) Saudia Arabia | SP Power3 375 MHz 16 way IBM | 512 | 2001 | 561 | 768 |
| 281 | US Army Research Laboratory (ARL) United States | SP Power3 375 MHz 16 way IBM | 512 | 2000 | 561 | 768 |
| 282 | ID-IMAG / INRIA Rhone-Alpes France | Cluster Platform 6000 rx2600 Itanium2 900 MHz Cluster - Myrinet Hewlett-Packard | 208 | 2003 | 561 | 748.8 |
| 283 | Deutsche Telekom AG Germany | SP Power3 375 MHz IBM | 528 | 2000 | 553 | 792 |
| 284 | Wright-Patterson Air Force Base/DoD ASC United States | SP Power3 375 MHz IBM | 528 | 2000 | 553 | 792 |
| 285 | ERDC MSRC United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 286 | ERDC MSRC United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 287 | Government United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 288 | Government United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 289 | Wright-Patterson Air Force Base/DoD ASC United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 290 | Wright-Patterson Air Force Base/DoD ASC United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 291 | Wright-Patterson Air Force Base/DoD ASC United States | ORIGIN 3000 700 MHz SGI | 512 | 2003 | 553 | 716.8 |
| 292 | United Kingdom Meteorological Office United Kingdom | T3E900 Cray Inc. | 876 | 1997 | 552 | 788.4 |
| 293 | University of Michigan, Center for Advanced Computing United States | AMD AthlonMP Cluster 1.667 GHz - Myrinet Atipa Technology | 256 | 2003 | 550 | 853.5 |
| 294 | Financial Services (D) United States | pSeries 690 Turbo 1.7 GHz GigEth IBM | 144 | 2003 | 549 | 979.2 |
| 295 | State Farm United States | SP Power3 375 MHz IBM | 520 | 2001 | 546 | 780 |
| 296 | Wright-Patterson Air Force Base/DoD ASC United States | AlphaServer SC45, 1 GHz Hewlett-Packard | 324 | 2002 | 540 | 648 |
| 297 | Government Germany | AlphaServer SC45, 1.25 GHz Hewlett-Packard | 256 | 2003 | 538.4 | 640 |
| 298 | Los Alamos National Laboratory United States | ASCI Q - AlphaServer SC45, 1.25 GHz Hewlett-Packard | 256 | 2002 | 538.4 | 640 |
| 299 | Pharmaceutical Company Germany | SP Power3 375 MHz IBM | 510 | 2001 | 536 | 765 |
| 300 | Indiana University United States | SP Power3 375 MHz IBM | 508 | 2001 | 534 | 762 |