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In June 2009, 44 systems appeared in the TOP500 list.

Rank System Procs Memory(GB) Rmax (GFlops) Rpeak (GFlops) Vendor
25 Power 575, p6 4.7 GHz, Infiniband 8320 N/A 115900 156416 IBM
26 Power 575, p6 4.7 GHz, Infiniband 8320 N/A 115900 156416 IBM
68 HECToR
Cray XT4, 2.8 GHz		 11328 33200 54648 63436.8 Cray Inc.
73 UKMO B
Power 575, p6 4.7 GHz, Infiniband		 3520 N/A 51863.3 66176 IBM
74 UKMO A
Power 575, p6 4.7 GHz, Infiniband		 3520 N/A 51863.3 66176 IBM
127 Cray XT3, 2.6 GHz dual Core 7812 N/A 33929.4 40622.4 Cray Inc.
149 Cluster Platform 3000 BL460c G1, Xeon L5420 2.5 GHz, GigE 5904 N/A 31361.6 59040 HP
162 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 4616 N/A 29566.5 55392 HP
174 BlueCrystal
xSeries x3450 Cluster Xeon quad core, 2.8 GHz, Infiniband		 3360 N/A 28775 37632 ClusterVision/IBM
184 Cluster Platform 3000 BL460c G1, Xeon E5450 3.0 GHz, GigE 4336 N/A 27802.2 52032 HP
201 Cluster Platform 3000 BL460c G1, Xeon L5420 2.5 GHz, Infiniband 3368 N/A 26667.7 33680 HP
202 Cluster Platform 3000 BL460c G5, Opteron 2352 2.1GHz, GigE 5952 N/A 26553.1 49996.8 HP
225 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3856 N/A 24768.8 46272 HP
235 Cluster Platform 3000 BL460c G1, Xeon L5420 2.5 GHz SP6852UK, GigE 4552 N/A 24302.9 45520 HP
239 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3704 N/A 23806 44448 HP
243 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3664 N/A 23552.4 43968 HP
255 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3592 N/A 23095.8 43104 HP
266 Cluster Platform 3000 BL460c G1, Xeon E5440 2.83 GHz, GigE 3776 N/A 22887.4 42744.3 HP
271 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3480 N/A 22385 41760 HP
276 Cluster Platform 3000 BL460c G1, Xeon L5420 2.5 GHz, GigE 4108 N/A 21968.9 41080 HP
278 Cluster Platform 3000 BL460c G1, Xeon E5440 2.83 GHz, GigE 3616 N/A 21930.7 40933.1 HP
280 Cluster Platform 3000 BL460c, Xeon 54xx 2.5 GHz, GigEthernet 4096 N/A 21905.7 40960 HP
294 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 3352 N/A 21572 40224 HP
303 Cluster Platform 3000 BL460c, Xeon E54xx 2.33 GHz, GigEthernet 4256 N/A 21201 39665.9 HP
321 Cluster Platform 3000 BL460c G1, Xeon E5440 2.83 GHz, GigE 3396 N/A 20613 38442.7 HP
323 Cluster Platform 3000 BL460c, Xeon 51xx 3.0GHz, GigEthernet 3200 N/A 20605.4 38400 HP
324 Cluster Platform 3000 BL460c, Xeon 51xx 3.0GHz, GigEthernet 3200 N/A 20605.4 38400 HP
332 Merlin
Novascale R422 Cluster, Xeon E5472, 3.00 GHz, Infiniband		 2048 4096 20120 24576 Bull
335 BladeCenter JS21 Cluster, PPC 970, 2.5 GHz, Myrinet 2800 N/A 20051 28000 IBM
352 UKMO C
Power 575, p6 4.7 GHz, Infiniband		 1280 N/A 19558.3 24064 IBM
353 Cluster Platform 3000 BL460c, Xeon 54xx 2.66GHz, GigEthernet 3408 N/A 19493.8 36356.5 HP
358 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 2992 N/A 19281 35904 HP
359 BladeCenter HS21 Cluster, Xeon QC HT 3 GHz, Infiniband 2144 N/A 19237.7 25728 IBM
364 Cluster Platform 3000 BL460c, Xeon E54xx 2.33 GHz, GigEthernet 3824 N/A 19079.8 35639.7 HP
380 Cluster Platform 3000 BL460c, Xeon L54xx 2.83 GHz, GigEthernet 3120 N/A 18957.5 35318.4 HP
383 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 2940 N/A 18949.6 35280 HP
385 PowerEdge 1950, Xeon 51xx 3.06 GHz, Infinipath 1992 8192 18930 24382 ClusterVision/Dell
413 BladeCenter HS21 Cluster, Xeon dual core, 3.0 GHz, GigEthernet 3840 N/A 18600 46080 IBM
449 Darwin
PowerEdge 1950, 3.0 GHz, Infinipath		 2340 N/A 18270 28080 ClusterVision/Dell
450 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 2832 N/A 18260.8 33984 HP
481 Cluster Platform 4000 BL465c, Opteron QC 2.3GHz, GigE 3548 N/A 17492.8 32641.6 HP
484 Cluster Platform 3000 BL460c, Xeon 54xx 3.0GHz, GigEthernet 2680 N/A 17440.5 32160 HP
493 Cluster Platform 3000 BL460c G1, Xeon L5420 2.5 GHz SP6872UK, GigE 3200 N/A 17171.2 32000 HP
500 BladeCenter HS21 Cluster, Xeon dual core 2.66 GHz, GigEthernet 3528 N/A 17088.8 37636.7 IBM