More RAM not recognized -

[Alan Cox]

On Fri, 29 Jul 2011 17:06:58 +0200
Michael Schwendt <mschwendt at gmail.com> wrote:

> On Fri, 29 Jul 2011 10:38:15 -0400, BG (Bob) wrote:
> 
> > 
> >     This Dell DM4700 came with 2-256 mb strips, some time ago I added
> >     2-1 gb strips for a total of 2.5 gb.
> > 
> >     This morning I replaced the 256 mb strips with 2-2 gb for a total of
> >     6. The bios setup screen shows 6 gb but apparently Linux is only
> >     using half that amount, not much of an improvement!:
> 
> Install the  kernel-PAE  package, then reboot to the PAE kernel and remove
> the normal  kernel  package.

I suspect a more fundamental problem. At least according to the Dell
material the Dimension 4700 can only actually make fully use of 4GB
(and in fact I imagine 3GB or 3.5GB in reality). It also needs a specific
BIOS version to use 2Gb sticks, which presumably as it's detecting them
and booting OK the BIOS is new enough.

Alan