Asked and answered elsewhere.
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Richard G. Harper [MVP Shell/User] rgharper@xxxxxx
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"ADO. Inconnu" <adoinconnu@xxxxxx> wrote in message
news:OISZKyULIHA.4808@xxxxxx
Quote:
>I bought my SonyVaio Notebook Computer (VGN-SZ57N, with 1GB of Ram) coming
>with an Vista Business installed, I can't work with its poor performance,
>so I bought / installed another new 4GB(2x2GB) Ram to replace the original
>1GB of Ram(Product Spec. told that it support 4GB of Ram). As a result I
>realized both the Bios and Vista the OS seeing only 3GB(actually 3070MB)
>Physical Memory. I google around and I heard about Hardware's lacking of
>remapping feature and Software's 32 bit OS limitation issues, but I hope I
>still can hear someone here told me that this is an deadend for getting my
>current computer to see and work with 4GB of Ram.
>
> Please let me know whether this is a motherboard limitation or this is a
> matter of 32bit versions of Windows, any explaination... Thanks so much
> for your kindly help, I just felt sick of keeping search on this topic and
> I think I can accept all of this if this is a matter of time (People told
> me SP1 could solve all of this) or money (They told me I should upgrade to
> 64bit Vista Ultimate to work 4GB Ram). Hey, anyway thanks again, have a
> nice day. 
>
> A.