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In June 2008, 22 systems appeared in the TOP500 list.

Rank System Procs Memory(GB) Rmax (GFlops) Rpeak (GFlops) Vendor
16 T2K Open Supercomputer (Todai Combined Cluster)
Hitachi Cluster Opteron QC 2.3 GHz, Myrinet 10G		 12288 N/A 82984 113050 Hitachi
20 T2K Open Supercomputer
Appro Xtreme-X3 Server - Quad Opteron Quad Core 2.3 GHz, Infiniband		 10000 20416 76460 92000 Appro
24 TSUBAME Grid Cluster with CompView TSUBASA
Sun Fire x4600/x6250 Cluster, Opteron 2.4/2.6 GHz and ClearSpeed Accelerator, Xeon E5440 2.833 GHz, Infiniband		 12344 21600 67700 109728 NEC/Sun
34 T2K Open Supercomputer/Kyodai
Fujitsu Cluster HX600, Opteron Quad Core, 2.3 GHz, Infiniband		 6656 13312 50510 61235 Fujitsu
49 Earth-Simulator 5120 N/A 35860 40960 NEC
76 Cray XT4 QuadCore 2.2 GHz 3248 N/A 22740 28582 Cray Inc.
101 Blue Protein
eServer Blue Gene Solution		 8192 N/A 18665 22937.6 IBM
104 KEK/BG MOMO
eServer Blue Gene Solution		 8192 N/A 18665 22937.6 IBM
105 KEK/BG Sakura
eServer Blue Gene Solution		 8192 N/A 18665 22937.6 IBM
155 SR11000-J2 128 16384 15811 18841.6 Hitachi
172 PRIMERGY RX200S3, Xeon Dual Core 3.0 GHz, Infiniband 1536 3072 15090 18432 Fujitsu
174 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 2232 N/A 14980.4 26784 HP
177 Cluster Platform 3000 BL460c, Xeon 52xx 3 GHz, GigEthernet 2216 N/A 14942.3 26592 HP
184 Altix 4700 1.6 GHz 2560 3000 14593 16384 SGI
235 Cluster Platform 3000 BL460c, Xeon 52xx 3 GHz, GigEthernet 1992 N/A 13635.1 23904 HP
299 SGI Altix 3700 Bx2, 1.6 GHz, NUMALink 2048 N/A 11814 13107 SGI
335 Fujitsu Primequest, Itanium2 Dual Core 1.6 Ghz, Infiniband 2048 4096 10850 13107 Fujitsu
357 PACS-CS
PACS-CS, low voltage Xeon 2.8 GHz, 3D Hyper-Crossbar		 2560 5120 10350 14336 Hitachi/Fujitsu
412 KEK/BG UME
eServer Blue Gene Solution		 4096 N/A 9433 11468.8 IBM
480 Fujitsu PFU RG1000, Core2Duo 1.5 GHz, GigEthernet 2048 2048 9045 12288 Fujitsu
482 SR11000-K1/80 80 N/A 9036 10752 Hitachi
483 SR11000-K1/80 80 N/A 9036 10752 Hitachi