United Kingdom
In November 1999, 24 systems appeared in the TOP500 list.
| Rank | System | Procs | Memory(GB) | Rmax (GFlops) | Rpeak (GFlops) | Vendor |
|---|---|---|---|---|---|---|
| 11 | T3E900 | 876 | N/A | 552 | 788.4 | Cray Inc. |
| 13 | T3E1200 | 636 | N/A | 526 | 763.2 | Cray Inc. |
| 14 | T3E1200 | 612 | N/A | 509 | 734.4 | Cray Inc. |
| 49 | T3E900 | 348 | N/A | 218 | 313.2 | Cray Inc. |
| 50 | VPP700/116 | 116 | N/A | 213 | 255.2 | Fujitsu |
| 64 | SP PC604e 332 MHz | 468 | N/A | 143.3 | 310.7 | IBM |
| 88 | SP P2SC 160 MHz | 252 | N/A | 109.9 | 161.2 | IBM |
| 102 | VPP700/48E | 48 | N/A | 97.5 | 115.2 | Fujitsu |
| 107 | SP PC604e 332 MHz | 302 | N/A | 93.1 | 200.5 | IBM |
| 113 | SP P2SC 160 MHz | 190 | N/A | 83.5 | 121.6 | IBM |
| 127 | SP P2SC 160 MHz | 178 | N/A | 78.4 | 113.9 | IBM |
| 176 | SR2201/256 | 256 | N/A | 58.68 | 76.8 | Hitachi |
| 183 | SP PC604e 332 MHz | 184 | N/A | 57.51 | 122.17 | IBM |
| 192 | SP Power3 200 MHz | 92 | N/A | 56 | 73.6 | IBM |
| 201 | ORIGIN 2000 250 MHz | 128 | N/A | 51.44 | 64 | SGI |
| 275 | SP PC604e 332 MHz | 148 | N/A | 46.6 | 98.29 | IBM |
| 287 | SP PC604e 332 MHz | 140 | N/A | 44.27 | 92.96 | IBM |
| 323 | HPC 10000 400 MHz | 64 | N/A | 43.82 | 51.2 | Sun |
| 346 | SP Power3 200 MHz | 68 | N/A | 42.2 | 54.4 | IBM |
| 417 | SP PC604e 332 MHz | 118 | N/A | 37.57 | 78.35 | IBM |
| 430 | HPC 10000 400 MHz | 54 | N/A | 37.18 | 43.2 | Sun |
| 438 | HPC 10000 400 MHz | 52 | N/A | 35.83 | 41.6 | Sun |
| 467 | HPC 10000 333 MHz | 64 | N/A | 34.17 | 42.62 | Sun |
| 469 | HPC 10000 333 MHz | 64 | N/A | 34.17 | 42.62 | Sun |