Dear Georg,

I would like to stress that there is some danger in comparing
ADF2003.01 timings
for these platforms because:

1) We may switch to the Intel Fortran compiler as soon as it is stable
enough for
      a correct execution of all our test calculations. This compiler
has been shown to
      give much better performance for ADF on Xeon than the current
version.
     (Differences of a factor of two have been observed.)
     We do have some timings available for ADF2003.01 on 4-CPU and 8-CPU
     2.4 GHz Xeon machines from PQS (who pre-install ADF). I will send
these to you separately.

2) We do not yet have an optimized version for Opteron. The present
executables
      should run correctly, but probably the performance could be
improved. As we
      currently do not have such a machine available, it is not likely
that an optimized
      Opteron version for ADF will appear in the very near future.

Best regards,
Stan

On Friday, October 31, 2003, at 07:03 PM, H. Georg Schreckenbach wrote:

> Dear list,
>
> does anybody have any recent benchmarks (for ADF and other QC codes) or
> anecdotal evidence about which computer systems are the best right now
> to build
> a Beowulf? In particular, I have two quotes from a vendor for the
> following
> dual-processor systems
> (i) Intel Xeon 2.8GHz
> (ii) Opteron AMDOPT242 1.6GHz
> The vendor claims that the latter might be better. (The price is
> comparable.)
> Any comments?
>
> Thank you, and best wishes, Georg
>
> --
> Dr. H. Georg Schreckenbach
> Department of Chemistry, University of Manitoba
> Winnipeg, MB, R3T 2N2, Canada
> phone: (+204) 474-6261
> FAX: (+204) 474-7608
>
> -------------------------------------------------
> This mail sent through IMP: http://horde.org/imp/

Dr. S.J.A. van Gisbergen      
Scientific Computing & Modelling NV
Theoretical Chemistry, Vrije Universiteit
De Boelelaan 1083
1081 HV Amsterdam
The Netherlands                              
T: +31-20-4447626    
F: +31-20-4447629        
vangisbergen_at_scm.com  
http://www.scm.com
Received on 2003-11-03 10:23:10