Re:65 TFlop is only an estimate (Score 2, Informative)

Vector systems like SX-8 reach typically 50% of the peak performance in well tuned applications while massively parallel scalar systems crawl at less than 10% (no matter how much man power one invests in tuning). The effective performance of the SX-8 is much higher than that of BlueGene. The peak Linpack performance is meaningless, anyway. HPC Challenge benchmark makes a lot more sense for understanding what performance a machine can reach.