I just want to say that I really have appreciated this discussion - issues like this tend to get lost or not addressed when we're working on our codes, and it's been very enlightening for me.
Randy Satish Balay wrote: > On Wed, 16 Apr 2008, Berend van Wachem wrote: > >> Hi Barry, >> >> >>> http://www.intel.com/performance/server/xeon/hpc_ansys.htm >>> http://www.intel.com/performance/server/xeon/hpc_md_nastr.htm >> >> Aren't both benchmarks run on Quads? The difference just being the cache per >> processor? Or am I mistaken? > > Yes - both are quads, and yes - the cache sizes are different. > > But I think the primary feature that contributes to the performance > difference is memory bandwidth. The first one is 1333 FSB, the second > one is 1600FSB - i.e 20% improvement in memory bandwidth => 20% > improvement in performance for the above benchmarks. > > Satish >
