According to Cray and AMD, two Cray supercomputer products that leverage the AMD Opteron processor and HyperTransport technology, the Cray XT3 and Cray XD1 systems, have posted leading overall results on the HPC Challenge benchmark tests.
HPC Benchmarks: Going For Gold In A Computer Olympiad
The HPC Challenge benchmark is providing a new in-depth analysis of system performance. The HPC Challenge benchmark clearly shows the strength of parallel vector architectures and highly integrated systems with high bandwidth, low latency memory subsystems.
TOP500 and HPCC Benchmarks -- What They Can And Can't Do
The simplest punchline is that HPCC Linpack plus the four HPCC memory-access benchmarks give you data so that you can use the locality characteristics of the computational phases of your applications to predict when you will get Linpack-class performance from a given phase and when you will get much less.