Re: Opteron vs. Xeon performance differences

On Thu, Oct 9, 2008 at 3:34 PM, Bart Grantham <bg@logicworks.net> wrote:
> Forgive me if this has been beaten into the ground, but my team and I
> couldn't find much conclusive study or posts on this issue.  To make a long
> story short: we're experiencing Xeons as 50% slower than Opterons, even when
> the Xeon has twice as much cache and a slight clock speed advantage.

I'm not sure what causes this issue either, although I suspect it's
the inter-CPU / CPU to memory communication speeds that make the
difference.  It seems that as the number of CPUs increase, the opteron
lead increases over the xeon.