[ptx] x64 benchmarks

[Marek Januszewski]

Hal V. Engel wrote:
> As a side note.  All of this software likes LOTS of memory and one possible 
> benefit of going 64 bit is that you remove the 4 gigabyte barrier since these 
> CPUs support up to one terabyte of physical RAM.   Of course at this time you 
> will need to look around to find motherboards that support more than 4 gig 
> but I have seen examples that support up to 32 gig.  I don't know where the 
> point of diminishing returns is but if you are working with really large 
> images I am sure that it is far more than 4 gigabytes. 

As far as I know 32 bit systems now can go higher than 4 gb indirectly

--
best regards,
Marek