More RAM not recognized -

Andrew Haley aph at
Fri Jul 29 16:13:23 UTC 2011

On 07/29/2011 04:54 PM, Bob Goodwin wrote:
> On 29/07/11 11:06, Michael Schwendt 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.
>     That's done but "free" shows essentially the same amount of memory?
>     $ free
>                   total       used       free     shared    buffers    
>     cached
>     Mem:       3095008
>     I have not yet removed the original non-PAE kernels but I am booting
>     to the new PAE kernel. It looks like something else is going on.
>     Might be something in the bios configuration that needs changing or
>     maybe this computer can't handle more than 4 gb?

How much RAM does the BIOS say you have?

>     I did have, F-13 64 bit installed on it once but decided to stick
>     with 32 after that for simplicity, I wanted two set up the same and
>     the other box was 32 bit. That has been replaced so 64 is possible
>     if I must.

64-bit is better in almost every way.  I'd go for it, myself.


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