On Tue, 4 Mar 2008 10:39:42 -0600, murtibing
> I had problems with the acer 5920G, it came with 2GB RAM but clearly had
> memory problems as it would spend forever swapping data off the disk. I
> only ran the obvious stuff. Outlook, Explorer, Word and iTunes. Programs
> would hang in midair for up to 15 or more seconds while the processor
> was working on something else at 100%, with the Disk flat out and
> umpteen page faults. I looked into all sorts of things, being new to
> vista I spent ages on the problem. I gave up and bought 4GB of RAM.
> After swopping the RAM I checked and it only uses 3GB as I'm running
> Home Premium. But WOW that extra 1GB of RAM has made an enormous
> difference it now runs "normally".
Glad to hear that the extra RAM improved your performance.
But a word about "it only uses 3GB as I'm running Home Premium." It
has nothing to do with its being Home Premium.
Even though you have a 4GB address space, all 32-bit versions of
Windows can only use *around* 3.1GB of RAM. That's because some of
that space is used by hardware and not available to the operating
system and applications. The amount you can use varies, depending on
what hardware you have installed, but is usually around 3.1GB.
Note that the hardware is using the address *space*, not the actual
RAM itself. The rest of the RAM goes unused because there is no
address space to map it too.
Ken Blake, Microsoft MVP - Windows Desktop Experience
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