How do you determine the amount of system memory?

[jsmith at alum.mit.edu]

On Wed, Jul 16, 2008 at 5:07 PM, Dave Johnson <dave-gnhlug-list at davej.org>
wrote:

> Dave Johnson writes:
> > The e820 info from the BIOS can help too (provided your BIOS is
> > bug-free), get it from dmesg or /var/log/dmesg
> >
> > system 3
> > --------
> >
> > BIOS-provided physical RAM map:
> >  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> >  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> >  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> >  BIOS-e820: 0000000000100000 - 000000007dee0000 (usable)
> >  BIOS-e820: 000000007dee0000 - 000000007dee3000 (ACPI NVS)
> >  BIOS-e820: 000000007dee3000 - 000000007def0000 (ACPI data)
> >  BIOS-e820: 000000007def0000 - 000000007df00000 (reserved)
> >  BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
> >
> > below 4GB PA is from 0000000000000000 - 0000000080000000 (2GB)
> > above 4GB PA is no memory
> >
> > This system has 2GB RAM all of which are from 0MB-2GB PA
>
> one thing to watch out for is system 3 above has integrated graphics
> where the bios has stolen 32MB (7e000000-80000000)
>
> --
> Dave
>

Don't know if my BIOS is flakey or not, but it does lie - it says my machine
(HP 9000 / AMD Turion x2) has 2GB memory - but I have 4GB installed (and
Linux sees all 4GB - Windows only saw 2GB before I nuked it from the
machine).

jeff
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