Hi,
I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
@2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
of RAM.
I can see the 4GB of RAM in the Bios, but windows can't see it because it's
32 bit. I found articles with Microsoft so you can tune the memory. I
followed the documentation and modified the bootini. I didn't have much luck
I can only see 3GB in window mean while 4GB in the BIOS.

This is the bootini "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
/NoExecute=OptOut".

Any Idea, note the machine supports DEP.

"Yman" <(E-Mail Removed)> wrote in message
news171EF81-C231-4F43-BE6A-(E-Mail Removed)...
> Hi,
> I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4
> GB
> of RAM.
> I can see the 4GB of RAM in the Bios, but windows can't see it because
> it's
> 32 bit. I found articles with Microsoft so you can tune the memory. I
> followed the documentation and modified the bootini. I didn't have much
> luck
> I can only see 3GB in window mean while 4GB in the BIOS.
>
> This is the bootini
> "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> /NoExecute=OptOut".
>
> Any Idea, note the machine supports DEP.
>
>
You cannot access the full 4GB because Windows uses memory mapped i/o. This
unavailable 1 GB overlaps the i/o devices hence it cannot be used.
Jim

Thanks,

So there's no way I can do this, I picked up this article from Microsoft Web
Site

http://support.microsoft.com/default...b;en-us;291988

"Jim" wrote:

>
> "Yman" <(E-Mail Removed)> wrote in message
> news171EF81-C231-4F43-BE6A-(E-Mail Removed)...
> > Hi,
> > I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> > @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4
> > GB
> > of RAM.
> > I can see the 4GB of RAM in the Bios, but windows can't see it because
> > it's
> > 32 bit. I found articles with Microsoft so you can tune the memory. I
> > followed the documentation and modified the bootini. I didn't have much
> > luck
> > I can only see 3GB in window mean while 4GB in the BIOS.
> >
> > This is the bootini
> > "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> > Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> > /NoExecute=OptOut".
> >
> > Any Idea, note the machine supports DEP.
> >
> >
> You cannot access the full 4GB because Windows uses memory mapped i/o. This
> unavailable 1 GB overlaps the i/o devices hence it cannot be used.
> Jim
>
>
>

"Yman" <(E-Mail Removed)> wrote in message
news171EF81-C231-4F43-BE6A-(E-Mail Removed)...
> Hi,
> I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4
> GB
> of RAM.
> I can see the 4GB of RAM in the Bios, but windows can't see it because
> it's
> 32 bit.

Not exactly. Windows can see it, it just won't let you use most of the
last gig because it uses it for system devices.

You will *not* get to use all 4 gig as user memory.

> I found articles with Microsoft so you can tune the memory. I
> followed the documentation and modified the bootini. I didn't have much
> luck
> I can only see 3GB in window mean while 4GB in the BIOS.

Then you've pretty much "tuned" it as much as possible.

>
> This is the bootini
> "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> /NoExecute=OptOut".
>
> Any Idea, note the machine supports DEP.

You have already achieved your goal, as far as it is attainable. If you
want to use more memory, you'l l need a 64 bit OS.

HTH
-pk

On Mon, 15 Sep 2008 11:00:01 -0700, Yman
<(E-Mail Removed)> wrote:

> Hi,
> I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
> of RAM.
> I can see the 4GB of RAM in the Bios, but windows can't see it because it's
> 32 bit. I found articles with Microsoft so you can tune the memory. I
> followed the documentation and modified the bootini. I didn't have much luck
> I can only see 3GB in window mean while 4GB in the BIOS.



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 too.

--
Ken Blake, Microsoft MVP - Windows Desktop Experience
Please Reply to the Newsgroup

Thanks

I will be glad if I can get the machine to show 3.5GB of RAM. Is there any
other way than editing the Boot.ini ??

"Ken Blake, MVP" wrote:

> On Mon, 15 Sep 2008 11:00:01 -0700, Yman
> <(E-Mail Removed)> wrote:
>
> > Hi,
> > I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> > @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
> > of RAM.
> > I can see the 4GB of RAM in the Bios, but windows can't see it because it's
> > 32 bit. I found articles with Microsoft so you can tune the memory. I
> > followed the documentation and modified the bootini. I didn't have much luck
> > I can only see 3GB in window mean while 4GB in the BIOS.
>
>
>
> 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 too.
>
> --
> Ken Blake, Microsoft MVP - Windows Desktop Experience
> Please Reply to the Newsgroup
>

Thanks,

I've tried only the /3GB switch, I only can see 3GB of RAM on the System
Properties.

"Thee Chicago Wolf" wrote:

> >I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> >@2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
> >of RAM.
> >I can see the 4GB of RAM in the Bios, but windows can't see it because it's
> >32 bit. I found articles with Microsoft so you can tune the memory. I
> >followed the documentation and modified the bootini. I didn't have much luck
> >I can only see 3GB in window mean while 4GB in the BIOS.
> >
> >This is the bootini "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> >Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> >/NoExecute=OptOut".
> >
> >Any Idea, note the machine supports DEP.
>
> PAE is not for Windows XP so get rid of that. Only leave the /3GB
> switch. I would also ditch the /USEVA switch too. Only specific
> applications installed would require you to need that switch and the
> parameters following it. Do more research on Google for this.
>
> - Thee Chicago Wolf
>

Yman wrote:
> Hi,
> I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
> of RAM.
> I can see the 4GB of RAM in the Bios, but windows can't see it because it's
> 32 bit. I found articles with Microsoft so you can tune the memory. I
> followed the documentation and modified the bootini. I didn't have much luck
> I can only see 3GB in window mean while 4GB in the BIOS.
>
> This is the bootini "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> /NoExecute=OptOut".
>
> Any Idea, note the machine supports DEP.

Windows XP doesn't fully support PAE and the 4GT RAM Tuning doesn't
really have anything to do with physical memory (RAM), it affects how
the Virtual Address Space is alloted between user mode processes and the
kernel-mode components, you should remove these switches from the
boot.ini file. Due to hardware addressing needs Windows XP 32-bits
cannot fully utilize 4GB of RAM and there is no way to overcome the
limitation.

John

Thanks,

How about if you have Qautro Process on windwos XP SP2 ?? will that work ?

"John John (MVP)" wrote:

> Yman wrote:
> > Hi,
> > I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
> > @2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
> > of RAM.
> > I can see the 4GB of RAM in the Bios, but windows can't see it because it's
> > 32 bit. I found articles with Microsoft so you can tune the memory. I
> > followed the documentation and modified the bootini. I didn't have much luck
> > I can only see 3GB in window mean while 4GB in the BIOS.
> >
> > This is the bootini "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
> > Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
> > /NoExecute=OptOut".
> >
> > Any Idea, note the machine supports DEP.
>
> Windows XP doesn't fully support PAE and the 4GT RAM Tuning doesn't
> really have anything to do with physical memory (RAM), it affects how
> the Virtual Address Space is alloted between user mode processes and the
> kernel-mode components, you should remove these switches from the
> boot.ini file. Due to hardware addressing needs Windows XP 32-bits
> cannot fully utilize 4GB of RAM and there is no way to overcome the
> limitation.
>
> John
>
>

With Windows XP 32-bits there is *no* *way* to overcome the limitation.
You should only use the /3GB switch if an application vendor instructs
you to do so, using this switch can starve the operating system of
needed virtual memory and it will do absolutely nothing to help you
access the unavailable RAM.

John

Yman wrote:

> Thanks,
>
> How about if you have Qautro Process on windwos XP SP2 ?? will that work ?
>
> "John John (MVP)" wrote:
>
>
>>Yman wrote:
>>
>>>Hi,
>>>I 'm running windows XP SP2 on thinkcentre M55 with Intel Core 2 Duo E6550
>>>@2.33GHZ. I'm trying to tune the memory on windows xp sp2 so I can have 4 GB
>>>of RAM.
>>>I can see the 4GB of RAM in the Bios, but windows can't see it because it's
>>>32 bit. I found articles with Microsoft so you can tune the memory. I
>>>followed the documentation and modified the bootini. I didn't have much luck
>>>I can only see 3GB in window mean while 4GB in the BIOS.
>>>
>>>This is the bootini "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft
>>>Windows XP Professional" /fastdetect /PAE /3GB /Userva=2900
>>>/NoExecute=OptOut".
>>>
>>>Any Idea, note the machine supports DEP.
>>
>>Windows XP doesn't fully support PAE and the 4GT RAM Tuning doesn't
>>really have anything to do with physical memory (RAM), it affects how
>>the Virtual Address Space is alloted between user mode processes and the
>>kernel-mode components, you should remove these switches from the
>>boot.ini file. Due to hardware addressing needs Windows XP 32-bits
>>cannot fully utilize 4GB of RAM and there is no way to overcome the
>>limitation.
>>
>>John
>>
>>