Vista x32 will report different amounts of RAM depending on how you have
your computer set up. If a user has 4 GB of RAM installed and a basic
video card with say around 256 MB of video RAM windows will probably
show between 3-3.25 GB of RAM available because the total amount of
memory windows will see is 4 GB system wide. That includes video RAM,
any memory attached to the motherboard, CPU cache, and then lastly your
DDR RAM cards. Now if you take the same computer and upgrade your video
card to say 2x512 video cards so a total of 1gb of video RAM. The amount
of RAM windows will report then would drop to between 2-2.25 GB of RAM,
due to your increase in video RAM. The BIOS will report all of the RAM
installed because the BIOS is running in a 64 bit mode and is not
limited to the 4 GB restriction on a 64 bit ready motherboard. If you
wish to utilize all of the RAM installed in your computer I would
suggest reinstalling windows using the 64 bit kernal.


--
Ozymandias