AW: AW: [Wien] help on computer for WIEN2k calculation

[Gerhard Fecher]

Sorry, my remark was not about a fight between AMD and Intel.
Anyway, things come things go, most of the processors I started to work with in the last millenium are gone and these two will not do different.
Ciao
Gerhard



-----Ursprüngliche Nachricht-----
Von: wien-bounces at zeus.theochem.tuwien.ac.at im Auftrag von Peter Blaha
Gesendet: Mi 21.12.2005 07:59
An: A Mailing list for WIEN2k users
Betreff: Re: AW: [Wien] help on computer for WIEN2k calculation
 
I've put new benchmarks for AMD Opterons (directly made by SUN) and 
Itanium-2 (made by SGI) on the benchmark page. "Nothing new" on the AMD 
side, but surprisingly good numbers for Itanium-2 (122 sec on a single 
processor). But beware, usually an Itanium-2 machine is several times 
more expensive!

I guess the whole discussion about AMD vs. Intel shoulds not be done as a 
fight between two "religions". Take the code(s) which you want to use most 
and test the timing. Take whatever is best for you! 
And don't be surprised, that P4s (sometimes) win. Their theoretical 
peakperformance is MUCH larger than that on Opterons, simply due to the 
higher clock-frequency (typically 7200 vs 4800 GFlops). If a program can 
use this and is not limited by some P4-bottlenecks (memory access), it 
will be faster. 

> >an Intel cpu is significantly faster than AMD (160 vs 260 seconds, see
> >benchmarks) !!
> 
> I would appreciate if anybody with current AMD processors _and_ compiler
> version could contribute benchmarks to the list - a lot of the present
> entries are for old or unspecified versions of ifc, and furthermore ifc
> seems to need some "help" to make full use of non-intel cpus, see
> http://www.swallowtail.org/naughty-intel.html
> 
> Martin
> 
> -- 
> Dr. Martin Kroeker            martin at ruby.chemie.uni-freiburg.de
> c/o Prof.Dr. Caroline Roehr
> Institut fuer Anorganische und Analytische Chemie der Universitaet Freiburg
> 
> _______________________________________________
> Wien mailing list
> Wien at zeus.theochem.tuwien.ac.at
> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
> 
> 


                                      P.Blaha
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Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
Phone: +43-1-58801-15671             FAX: +43-1-58801-15698
Email: blaha at theochem.tuwien.ac.at    WWW: http://info.tuwien.ac.at/theochem/
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