use### [at] domaininvalid wrote:
> Hi all,
> 
> If you look at the end of a review of Opterons at 
> http://www.linuxhardware.org/Features/03/12/17/189239.shtml, you can see 
> benchmarks done with Pov-Ray compiled for x86-64 and for regular x86, 
> using the same scene description. The images are non-identical, and I'd 
> like to know why this is; is it just because all calculations are done 
> with 64 bit precision, as the article says, or are there other 
> differences in Pov-Ray's behaviour on x86-64 systems?

If that are really true results of the official benchmark (i.e. not made 
with other render options) i find the results quite bad for such 
expensive systems.  Of course a hardware like that is quite 
'underemployed' with rendering the POV-Ray benchmark but the Xeon for 
example seems not much faster than my Athlon XP 2600 here and you 
probably could get a dozen of them for the same price as the Xeon...

The 22:20 for the Opteron is of course not that bad but you can achieve 
similar results on much cheaper hardware, i.e. Athlon 64:

http://www.linuxhardware.org/article.pl?sid=04/03/18/2143203


Christoph

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