[Bioclusters] Cluster specs

[John Van Workum]

Joe,

>
> Have a good hard look at Opterons.  Better performers by far on bio
> codes than Athlons, and on chem codes.  The 64 bit OS and builds have
> been shown to give (a free and) significant performance advantage over
> the pure 32 bit binaries.

But to take full advantage of a 64-bit OS, shouldn't 32 bit code be rewritten
for 64-bit OS? Is the performance boost you are seeing mostly due to the
higher performance of the HW (faster FSB), better compiler, both? How did you
test and compare the two binaries?

Thanks,

John
TTI