Opteron got preety much fuxored in the poo hole in Linux kernel bench.
I'm not sure that's entirely the case. Remember this is a single-core
Opteron that was released August 5th of 2003 being compared against a
3.8GHz Xeon released Sept. 26th of 2005 and a dual-core Xeon that
won't be released for several months yet.
In short, there really isn't much you can read into the comparative
scores of the various chips.
No surprise - 2 year old single core 130nm Opty246 beaten by not yet
released latest and greatest Intel 65nm dual core (though 246 still
managed to win a few benchmarks). Should've been matched to 280, or to
quad 852(equal core number) - the picture would've been different. By
the time Dempsey is released in quantities, AMD will probably have
something a few speed grades up from 280.
NNN