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Date:      Wed, 01 Nov 2006 08:48:05 -0500
From:      Chuck Swiger <cswiger@mac.com>
To:        Greg Black <freebsd@mail.gbch.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: 6.x from i386 to amd64
Message-ID:  <4548A595.4040703@mac.com>
In-Reply-To: <nospam-1162347119.76314@iliad.gbch.net>
References:  <45475298.5090709@inoc.net> <nospam-1162325643.69866@iliad.gbch.net> <20061031153134.0f587f84.wmoran@collaborativefusion.com> <nospam-1162327947.70923@iliad.gbch.net> <20061031215648.GA1884@soaustin.net> <nospam-1162337728.73223@iliad.gbch.net> <4547FF75.4050102@inoc.net> <nospam-1162347119.76314@iliad.gbch.net>

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Greg Black wrote:
[ ... ]
> Dunno about PAE on i386 (and don't much care).  As it happens,
> my amd64 box is hardly higher end, but it has slots for 4GB and
> its doco claims that it can run with 4GB.  However, to my great
> displeasure, I discovered after setting it up that both its BIOS
> and any OS I install see weird and obviously wrong amounts of
> memory if I install 4GB.  The exact bad size varies, depending
> on various BIOS options, but ranges from 3.3GB up to 5.3GB (with
> various intermediate values, none of which is the correct 4GB).
> Updating the BIOS made no difference.

It's common for BIOSes to move the RAM occupying the same address space as the 
PCI range reserved for hardware above 4 GB; depending on the size of your AGP 
aperature (if present).

-- 
-Chuck



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