Problem with Memory

[Adriano Soares]

On the work place, they bought me a new computer with 4Mb DDRIII 800Mhz Ram.
The computer has Windows XP with all Service packs.
On BIOS setup we can see the 4Mb recognised, however on Windows Info Window
only 3Mb are recognised.
I work with AutoCAD2010 so all the ram are welcome.
What can I do so that Windows XP will take full advantage of the full ram ?

TIA
A.Soares

 

[vmanes]

http://lmgtfy.com/?q=windows+xp+4gb

Asked and answered lots and lots of times.

Oh, and you probably meany GB of RAM, not MB


On the work place, they bought me a new computer with 4Mb DDRIII 800Mhz Ram.
The computer has Windows XP with all Service packs.
On BIOS setup we can see the 4Mb recognised, however on Windows Info Window
only 3Mb are recognised.
I work with AutoCAD2010 so all the ram are welcome.
What can I do so that Windows XP will take full advantage of the full ram ?

TIA
A.Soares

 

[Mike Hall - MVP]

On the work place, they bought me a new computer with 4Mb DDRIII 800Mhz
Ram.
The computer has Windows XP with all Service packs.
On BIOS setup we can see the 4Mb recognised, however on Windows Info
Window only 3Mb are recognised.
I work with AutoCAD2010 so all the ram are welcome.
What can I do so that Windows XP will take full advantage of the full ram
?

TIA
A.Soares

32bit operating systems can ADDRESS 4gb. This total includes motherboard
resources which, in your case are absorbing 1gb.

 

[Ken Blake, MVP]

On the work place, they bought me a new computer with 4Mb DDRIII 800Mhz Ram.
The computer has Windows XP with all Service packs.
On BIOS setup we can see the 4Mb recognised, however on Windows Info Window
only 3Mb are recognised.
I work with AutoCAD2010 so all the ram are welcome.
What can I do so that Windows XP will take full advantage of the full ram ?

Nothing. There is no problem that needs to be fixed. It can't take
advantage of any more than you are getting now.

All 32-bit client versions of Windows (not just Vista/XP) have a 4GB
address space. That's the theoretical upper limit beyond which you can
not go.

But you can't use the entire 4GB of address space. Even though you
have a 4GB address space, you can only use *around* 3.1GB of RAM.
That's because some of that space is used by hardware and is not
available to the operating system and applications. The amount you can
use varies, depending on what hardware you have installed, but can
range from as little as 2GB to as much as 3.5GB. It's 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 to.

 

[Patrick Keenan]

On the work place, they bought me a new computer with 4Mb DDRIII 800Mhz
Ram.
The computer has Windows XP with all Service packs.
On BIOS setup we can see the 4Mb recognised, however on Windows Info
Window only 3Mb are recognised.
I work with AutoCAD2010 so all the ram are welcome.
What can I do so that Windows XP will take full advantage of the full ram
?

TIA
A.Soares

The only thing you could possibly do is to switch to a 64-bit OS. That
raises a host of other compatibility issues.

HTH
-pk

 

[Unknown]

Doesn't the hardware use ACTUAL ram when CD's run in DMA mode?