[citation][nom]stravis[/nom]You really shouldn't be running x64 on 4GB - you should double that if possible. x64 takes up more RAM for the same applications than if you were running the 32bit version. I can't remember where but I remember seeing the breakpoint between 32 and 64 bit versions and I think (don't quote me on it though) you had to be over 6GB of RAM to make the x64 version worthwhile.[/citation]
You really should NOT be running 32-bit if you've got 3GB of RAM or more, and especially not 4GB or more. And you'd have to be a moron to run 32-bit with 6GB RAM, unless you're doing it for some kind of compatibility reason. The 32-bit address space only encompasses 4GB, and a good chunk of that address space is wasted by PCI memory mapping, so some of your 4GB of RAM will go completely unused. YES, 32-bit systems can address more than 4GB RAM if they support PAE, but it has its own limitations and is a nasty hack. *I* think even if you've only got 2GB RAM you should seriously consider running 64-bit, and that's exactly what I'm doing in several situations with no regrets.