About the UltraSPARC T2plus memory controller discussion

This is really interesting in regard of the discussion about the reduced amount of memory controller in the UltraSPARC T2: Stream Benchmark Results on Sun SPARC Enterprise T5240 Server. On a two socket UltraSPARC T2plus systems the STREAMS TRIAD benchmark yields a result of 30 GB per second. On a single socket UltraSPARC T2 the same benchmark (executed by a customer) yields 16 GB/s. Obviously counting the amount of controller circuits isn´t enough to estimate the memory bandwidth a system is capable to use or to draw some more or less sensible conclusions out of it (as TPM tried to do).