On Nov 12, 2005, at 1:05 PM, William Robb wrote:
Photoshop makes pretty good performance leaps using Dual and Quad
processor G5s running Mac OS X. (From the quick demos I've seen,
so does Apple's upcoming Aperture software.) I don't know how it
does with multiprocessor hardware running on Windows XP.
I think the Windows OS may be the bottleneck. I suspect that I need
a 64bit OS to take advantage of 64 bit computers. I don't know if
XP does this or if something else is required.
It's not necessarily true that you need a "fully" 64bit OS to obtain
benefit from a 64bit cpu. What you need is access to the full address
space for large applications. This means that the memory management
and process management has to be capable to exploit the full
capabilities, but many other things would only slow down if they had
to push double the number of bits in data and instructions around all
the time.
Godfrey
