[Beowulf] Dual Core: real live data

[Mark Hahn]

> Dual 275 if you run with one core from each of the 275's.  For single CPU
> jobs, it seems that the 275's are about 7 to 10 percent faster than the
> 248.

if the 248 was 130nm, it would be several revisions older and have HT running
at 80% the speed as the 275.  the older rev would mean some missing tweaks 
to the memory controller, some core tweaks, and might even run the memory at 
a lower speed/higher latency.

it's a bit of a shame AMD hasn't made DC opterons more attractive, price-wise...