Is there any way I can get access to the rest of my memory?

NoOp glgxg at
Fri Sep 28 00:48:17 UTC 2012

On 09/27/2012 11:22 AM, Graham Watkins wrote:
> On 23/09/12 10:46, PleegWat wrote:
>> Isn't PAE in the desktop kernel nowadays? I don't know, I've been on
>> 64bit for a while now.
>> You may want to poke in your BIOS for a memory remapping feature.
>> Normally the top ~1GB of your system memory is shadowed by device
>> addresses. Your BIOS can remap the 'real' memory to a different
>> address range, making it accessible to PAE-aware operating systems.
>> Some BIOSes have this feature disabled by default since it reduces the
>> amount of memory visible to non-PAE aware OSes to 2GB or 3GB,
>> depending on the BIOS.
>> You may also want to verify if all of your hardware is actually
>> compatible - both your CPU and your chipset have to be able to handle PAE.
> I've looked in the bios (mobo is ASUS P5VD2-VM) for a memory remapping 
> feature and there isn't one.  I've already installed the latest bios 
> update so that won't help.  Googling brings up the problem but no 
> solution.  It looks as though I'm stuck
> as NoOp says:
>> And until you change that (see PleegWat's reply), 3GB is all you'll see
>> - regardless of whether you are running 32bitPAE or 64bit.
> Curses on ASUS for making a motherboard that will hold 4Gb RAM but won't 
> use it.  More curses on Crucial RAM for telling me I needed 4Gb ram.

Yeah. Sorry about that:


I have install total 4GB memory on my motherboard. However, it can only
recognize around 3.1GB or less. My friend's SLI board even less than
3GB. What's up? How should I do to recognize 4GB totally?"

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