Alfred Molon wrote:
Just wondering if there is image processing software which can make full
use of 64 bit processors with more than one core (i.e. Core 2 Duo, Core
2 Quad or equivalents from AMD) and which can use more than 4GB RAM (I
know for instance of mainboards which take 8GB RAM)? Intel is planning
to have a processor with 32 cores by 2009.

I believe that Adobe PhotoShop uses the facilities of the 64 bit
processors. Whether or not a program uses the dual core machines to
full advantage depends on both the architecture of the program, and the
setting, and design, of the compiler. Using multiple processors is not
a simple thing, and even if the program is compiled for optimal
multi-processor use, the OS must also support it well in order for
maximum benefit to be derived. For any given program design, there is a
point of diminishing returns when it comes to adding processors. At
some point, no further advantage in speed will be noted.

The RAM issue depends on board design, and OS limitations.