general question on speed using quad core Xeons

[Randall Mackie]

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
>