[Beowulf] /. Cooler room or cooler servers?
hahn at physics.mcmaster.ca
Thu Apr 7 20:14:37 EDT 2005
> > > One also needs to look at important ancillary issues like power
> > consumption
> > > of the cache, bus drivers, etc. And, of course, instruction stream
> > makes a
> > > big difference.
> >kind of obvious, don't you think? when I said peak, I meant peak,
> >and I'm quoting power dissipation measured at the wall plug (kill-a-watt).
> >for these systems, running two compute-intensive programs maxes out;
> >messing with memory or disks only adds a few watts (percent).
> My point was that the "Superior Power Efficiency" kind of chart (no matter
> where the numbers come from) is really meaningless. Simply knowing the
> basic technology level will tell you how many Joules/calculation you'll get
> to a first order. Any finer refinement will be very, very implementation
> and algorithm dependent.
I guess it's hard to argue with a "to a first order" statement.
but right now, AMD and Intel high-end chips are pretty comparable
in almost any performance metric, but AMD is noticably cooler.
this is not meaningless.
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
More information about the Beowulf