Memory on new computer

[Alan Cox]

On Mon, 16 Jul 2012 02:16:01 +0200
Reindl Harald <h.reindl at thelounge.net> wrote:

> 
> 
> Am 16.07.2012 02:14, schrieb Martín Marqués:
> > I had a problem with my main board and CPU and had to buy a new one.
> > Also memory, as the old computer had DDR2 memory.
> > 
> > Th problem is that I see only 3.5Gb of memory, while I had a 4Gb bank
> > put in the Motherboard (the motherboard says it can handle up to 32Gb
> > or ram).
> 
> sounds like you installed i686 instead x86_64

A 32bit kernel can still handle more than 4GB of RAM on most processors
as they have page address extensions. That depends on the build options.

More likely perhaps some hardware doesn't support remapping so it cannot
move the other 0.5GB above the 4GB boundary to leave space for PCI etc,
so just loses it.

Alan