The following KB article will explain why only 3GB of your RAM is being
used.
http://support.microsoft.com/kb/929605/en-us
"Len-Confused" <Len-> wrote in message
news:4FACFC42-3366-4E3B-A75D-...
>I just purchased a new machine with 4Gb Ram. When i go to the system info
>it
> says I only have 3Gb of RAM. I have checked the machine and their are
> 4-1Gb
> SIMMS there and crucial.com says I have 4Gb.
>
> Is this a limitation of Home Premium? Is it actually addressing all 4Gb
> or
> is it limited to 3Gb and if so what can I do to address all the RAM in my
> machine?
>
> Thanks Len