Xeon 51xx vs previous generations, threading

[Billinghurst, David (CALCRTS)]

> From:  David Hubbard
> 
> Can someone who's actually tested a 51xx-series
> Xeon tell me how they compare to previous generation
> Xeon's with regard to single-threaded applications?
>
> If aggregate, then the new Xeon seems
> like it would be a huge decrease in performance for
> anyone running single-threaded apps correct?  Even
> the bad ass Xeon 5160 at 3 GHz would be slower than
> the older 3.8 GHz Xeon DP for single threaded apps
> if this is true.
> 
> Someone who's tested this please let me know, thanks,


I have the same questions, but no answers.  We run 
commercial floating point modelling codes that don't 
parallelize very well, so single thread performance rules.

PS. The spec benchmarks are http://www.spec.org/cpu/results/res2006q2/


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