3.2Gb over 4Gb

[Patrick Dupre]

Hello,

I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
4Gb of RAM, but only 3.2Gb is accessible.
The bios recognizes the 4Gb but says that only 3.2Gb will be available,
but I expected that fedora 19 with be available to access the entire RAM.
This there something that I should do?

Thank.

===========================================================================
 Patrick DUPRÉ                                 | | email: [e-mail]
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale           | |
 Tel.  (33)-(0)3 28 23 76 12                   | | Fax: [phone]
 189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
===========================================================================

[staticsafe]

On Thu, Aug 08, 2013 at 10:08:45AM +0200, Patrick Dupre wrote:
> Hello,
>
> I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
> 4Gb of RAM, but only 3.2Gb is accessible.
> The bios recognizes the 4Gb but says that only 3.2Gb will be available,
> but I expected that fedora 19 with be available to access the entire RAM.
> This there something that I should do?
>
> Thank.
>
> ===========================================================================
>  Patrick DUPRÉ                                 | | email: [e-mail]
>  Laboratoire de Physico-Chimie de l'Atmosphère | |
>  Université du Littoral-Côte d'Opale           | |
>  Tel.  (33)-(0)3 28 23 76 12                   | | Fax: [phone]
>  189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
> ===========================================================================

Do you happen to have an integrated video card? Those sometimes take
some RAM as their own VRAM.

[Joe Zeff]

On 08/08/2013 01:08 AM, Patrick Dupre wrote:
> I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
> 4Gb of RAM, but only 3.2Gb is accessible.
> The bios recognizes the 4Gb but says that only 3.2Gb will be available,
> but I expected that fedora 19 with be available to access the entire RAM.
> This there something that I should do?

Are you using a PAE kernel?  (If your CPU is PAE capable, you probably 
are.)  If you're not sure, uname -r will tell you.

[Carlos Morel-Riquelme]

do you use 32 or 64 bits ?

2013/8/8 staticsafe
> On Thu, Aug 08, 2013 at 10:08:45AM +0200, Patrick Dupre wrote:
> > Hello,
> >
> > I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
> > 4Gb of RAM, but only 3.2Gb is accessible.
> > The bios recognizes the 4Gb but says that only 3.2Gb will be available,
> > but I expected that fedora 19 with be available to access the entire RAM.
> > This there something that I should do?
> >
> > Thank.
>
> ===========================================================================
> > Patrick DUPRÉ                                 | | email: [e-mail]
> >  Laboratoire de Physico-Chimie de l'Atmosphère | |
> >  Université du Littoral-Côte d'Opale           | |
> >  Tel.  (33)-(0)3 28 23 76 12                   | | Fax: [phone]
> >  189A, avenue Maurice Schumann                 | | 59140 Dunkerque,
>
> France
> >
>
> ===========================================================================
>
> Do you happen to have an integrated video card? Those sometimes take
> some RAM as their own VRAM.
> --
> staticsafe
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[Joachim Backes]

On 08/08/2013 10:33 AM, Joe Zeff wrote:
> On 08/08/2013 01:08 AM, Patrick Dupre wrote:
> > I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
> > 4Gb of RAM, but only 3.2Gb is accessible.
> > The bios recognizes the 4Gb but says that only 3.2Gb will be available,
> > but I expected that fedora 19 with be available to access the entire RAM.
> > This there something that I should do?

Having the the problem on my *x86_64 box* (CPU:Intel(R) Core(TM)2 Duo
CPU E8300  @ 2.83GHz)
Motherboard: abit I-45CV).  I think this a bios problem: It shows indeed
4 GB of mem, but both Linux and Win show only 3.2 GB of mem.

BIOS update did not help!
> Are you using a PAE kernel?  (If your CPU is PAE capable, you probably 
> are.)  If you're not sure, uname -r will tell you.

Kind regards

Joachim Backes

[Alexander Dalloz]

Am 08.08.2013 10:08, schrieb Patrick Dupre:
> Hello,
>
> I updated my inspiron 9400 (Genuine Intel® CPU T2300 @ 1.66GHz × 2) with
> 4Gb of RAM, but only 3.2Gb is accessible.
> The bios recognizes the 4Gb but says that only 3.2Gb will be available,
> but I expected that fedora 19 with be available to access the entire RAM.
> This there something that I should do?
>
> Thank.

The chipset of that laptop is not capable to address thze whole 4GB RAM.
That's not untypical for systems of that age (Intel T2300).

I still run an HP laptop with Intel T7600 on a mobile 945GM chipset and
have the same issue, just ~3.5GB out of populated 4GB RAM. No BIOS
update will help as this is a restriction by the chipset.

Alexander

[D. Hugh Redelmeier]

| From: Alexander Dalloz

| The chipset of that laptop is not capable to address thze whole 4GB RAM.
| That's not untypical for systems of that age (Intel T2300).

To back this up:

https://en.wikipedia.org/wiki/Dell_Inspiron#Inspiron_9400.2FE1705
says about the same thing.

It also says that the GM945 (or PM945) chipset is used.  Intel says
that 4G is max for those chipset:
http://ark.intel.com/products/27857/Intel-82945GM-Graphics-and-Memory-Controller
http://ark.intel.com/products/27858/Intel-82945PM-Memory-Controller