| System | Year | Vendor | Cores | Rmax (GFlop/s) | Rpeak (GFlop/s) | 
                    
                    
                        
                            
                                
                                | BladeCenter LS20, Opteron 2.2 GHz Dual core, GigEthernet | 2005 | IBM | 5,000 | 12,312 | 22,000 | 
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS20 Cluster, Xeon EM64T 3.6 GHz - Gig-Ethernet | 2005 | IBM | 512 | 2,075.7 | 3,686.4 | 
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    
                        
                            
                                
                                | POWER CHALLENGE | 1995 | HPE (SGI) | 12 | 2.9 | 3.6 | 
                        
                    
                        
                            
                                
                                | POWER CHALLENGE | 1995 | HPE (SGI) | 8 | 2.0 | 2.4 |