Darren New wrote:
> Scott Gammans wrote:
> 
>> How can this be?
> 
> 
> My understanding is that Windows XP understands what hyperthreading is, 
> while 2000 merely treats hyperthreading as two independent CPUs. This 
> could be part of the difference. XP might be avoiding scheduling 
> background tasks that would interfere with PovRay, while 2000 thinks 
> it's OK because they're on a different CPU.
> 

And that explanation would make sense, except that during both 
benchmarks I set Render Priority in POV-Ray to "Highest", so even if 
Windows 2000 was ignorant of hyperthreading, wouldn't it still avoid 
scheduling background tasks because POV-Ray was running at highest priority?

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