|ALL add-on memory optimizers, managers, etc. are unnecessary and will impair performance. Vista does an excellent job of managing memory on it's own and needs no help from external memory managers. Any problems that might exist cannot be improved by an external memory manager.|
Vista memory management is criticized by people what have no real understanding of the principles involved. Most people, and that includes many computer professionals, have a hopelessly outmoded concept of how memory is managed in a modern operating system.
In spite of their claims, none of these memory optimizers actually defrag memory. Fragmented RAM has no performance implications and it is impossible for an external memory manager to do anything about it anyway. Defragmenting another applications address space is impossible. What these programs actually do is unnecessary and will almost always impair performance.
Mark Russinovich and David Solomon, both highly esteemed Windows experts, were very critical of these programs in "Windows Internals" 5th edition. This is a Microsoft publication and the most authoritative source of information concerning Windows internals.