Hi, Koala.
> *recognize* that 4th GB of RAM but can't *use* it?).
Vista x86 can use all the 4 GB of RAM. But some of that use is for video
RAM, drivers and other functions that you have no control over, leaving
less - typically about 3.2 GB but variable depending on YOUR hardware - for
you to decide how to use.
Suppose your local post office has 4,096 mailboxes available, but the PO
reserves 800 of those boxes for its own use. If there are only 1,000 mail
patrons in town, then there is no shortage and everybody gets their own
mailbox. When the town grows to 2,000 or even 3,000, there is still no
problem. But when another thousand patrons arrive, only about 200 will get
mailboxes. The other 800 boxes are there and they are not being wasted.
They are already in use (or reserved for something important).
The full 4 GB is being used, but you don't get to specify how some of it is
being used.
Vista SP1 did change the way the 4 GB is being reported to the user, but did
not change anything behind the curtain.
RC
--
R. C. White, CPA
San Marcos, TX
Microsoft Windows MVP
Windows Live Mail 2009 (14.0.8064.0206) in Win7 Ultimate x64 RC 7100
"Karmic Koala" <> wrote in message
news:...
>
> I have this question that what is the RAM limit with vista 32-bit and
> 64-bit?
>
> I've heard that it is 3,2 GB but I've also heard that it would be 4,0GB
> (because 2^32 = 4.294.967.296. But then 64-bit systems could use over 18
> exabytes of RAM, because 2^64 = 18.446.744.073.709.551.616? Isn't that a
> little too much o.O).
>
> I've also heard that Vista with SP1 ´recognizes´ 4GB of RAM (earlier
> windows reputedly recognized only 3GB of RAM so does this mean that from
> Vista SP1 windowses *recognize* that 4th GB of RAM but can't *use* it?).
>
>
> --
> Karmic Koala
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