summary :g03c 64bits vs 32 bits for opteron/athlon 64

[Bertrand Illien <Bertrand.Illien{at}univ-nantes.fr>]

 FIRST MESSAGE
> >  we would like to buy a new computer for use with G03/linux.
> > have you got few benchs time results of  g03revC. test files (
> >  test397 is fine)
> >  with 1/ g03 64bits compiled for opteron  (or/and  athlon 64)
> >        2/ g03 32 bits (compiled for pentium 4) on  the same opteron
> >  (or/and athlon 64)
> >  
> >  
> >  does the 64bits compilation vs 32 bits improve performances ?
> > does the new intel xeon with EM 64  perform better  than  P4 (1MB in
> >  L2)  with G03 32 bits program ?
> >  thanks for your help.
> >  sincerely yours
> >  Bertrand
 SUMMARY
 timing for test397.com  :
2Ghz  AMD64 (3200+, L2:1MB, socket 754) running Fedora Core 2 .  Codes
 compiled using portland 5.1
 <>   - 32 bits: 10678.677u
   - 64 bits: 10459.699u
 <>
 Negligibly faster in 64 bits, but with advantage of large scratch files
 (>16 Gb) and more than 2Gb memory handling for large jobs.
 END SUMMARY
 We also take an interest in test397 timings for others CPU :
opteron 248 or 250
 
 xeon 3.0 Or 3.2GHz (FSB 533, L2=512KB, L3=1MB)
 
 Thanks in advance
 Bertrand
 ______________________________________________________________________
 Bertrand ILLIEN
 Laboratoire de Spectrochimie et Modilisation
 EA 1149 - FR CNRS 2465
 Faculti des Sciences et Techniques
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 44322 Nantes Cedex 3 FRANCE
 Tel :(+33)(0)2 51 12 55 65 - Fax : 55 67
 http://www.sciences.univ-nantes.fr/spectro