| System | Year | Vendor | Cores | Rmax (GFlop/s) | Rpeak (GFlop/s) | 
                    
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2009 | IBM | 6,032 | 21,609 | 56,290.6 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2009 | IBM | 5,656 | 21,609 | 52,781.8 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2009 | IBM | 4,736 | 20,305.6 | 44,196.4 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2009 | IBM | 4,672 | 20,031.2 | 43,599.1 | 
                        
                    
                        
                            
                                
                                | BladeCenter HS21 Cluster, Xeon dual core, 2.33 GHz, GigEthernet | 2008 | IBM | 4,220 | 18,600 | 39,381.0 | 
                        
                    
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC HT, 2.5 GHz, GigEthernet | 2009 | IBM | 3,784 | 17,407.9 | 37,840 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2008 | IBM | 3,688 | 16,854.6 | 34,416.4 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon QC, 2.333 GHz, GigEthernet | 2008 | IBM | 3,416 | 15,898.1 | 31,878.1 | 
                        
                    
                        
                            
                                
                                | xSeries x3650 Cluster Xeon dual core 2.33 GHz, GigEthernet | 2008 | IBM | 2,056 | 10,146 | 19,186 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon quad core, 2.333 GHz, GigEthernet | 2008 | IBM | 1,704 | 9,287 | 15,901.7 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon quad core, 2.333 GHz, GigEthernet | 2008 | IBM | 1,704 | 9,287 | 15,901.7 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon quad core, 2.333 GHz, GigEthernet | 2008 | IBM | 1,840 | 9,287 | 17,170.9 | 
                        
                    
                        
                            
                                
                                | xSeries x3550 Cluster Xeon quad core, 2.333 GHz, GigEthernet | 2008 | IBM | 1,840 | 9,287 | 17,170.9 | 
                        
                    
                        
                            
                                
                                | xSeries x3650 Cluster Xeon dual core 2.33 GHz, GigEthernet | 2007 | IBM | 1,244 | 6,139.0 | 11,609.0 | 
                        
                    
                        
                            
                                
                                | pSeries 690 1.1GHz GigEth | 2002 | IBM | 72 | 152.4 | 316.8 |