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Date:      Tue, 4 Mar 2008 03:44:16 +0000
From:      RW <fbsd06@mlists.homeunix.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: RAM not recognized
Message-ID:  <20080304034416.1ae48519@gumby.homeunix.com.>
In-Reply-To: <18380.40222.870279.279849@jerusalem.litteratus.org>
References:  <47CC940B.5000400@123.com.sv> <47CC9BC0.1090408@datapipe.com> <18380.40222.870279.279849@jerusalem.litteratus.org>

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On Mon, 3 Mar 2008 19:51:42 -0500
Robert Huff <roberthuff@rcn.com> wrote:

> 
> Paul A. Procacci writes:
> >  >  AMD Features=0x20100000<NX,LM>
> >  >  AMD Features2=0x1<LAHF>
> >  >  Cores per package: 4
> >  > real memory  = 3484745728 (3323 MB)
> >  > avail memory = 3405631488 (3247 MB)
> 
> >  This is not a problem of FreeBSD but of i386/x86 architecture
> >  which max memory limit is 4GB i theory and 3-3.5GB in practice,
> >  you can use PAE to use 36bit addressing (instead of default
> >  32bit) for memory to get full 4GB on i386 but you will not be
> >  able to have loadable kernel modules for example, other sollution
> >  for this is using amd64/64bit FreeBSD, where you will have full
> >  4GB and even more without any problems.
> 
> 	... and not be able to run some ports; some won't run in
> native 64 bit mode, some won't run at all.

And also bear in mind that amd64 uses memory less efficiently than i386



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