Re: general question on speed using quad core Xeons

[Randall Mackie <rlmackie862@xxxxxxxxx>]

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