From owner-freebsd-hardware@FreeBSD.ORG  Tue Dec  9 15:24:14 2014
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Date: Tue, 9 Dec 2014 10:19:31 -0500 (EST)
From: Frank Seltzer <frank_s@bellsouth.net>
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To: freebsd-hardware@freebsd.org
Subject: Real vs available memory
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I have a Dell Studio XPS 7100 that came with 4 gigs of memory.  I have 
added another 4 gigs but there is a problem using it.  The system BIOS 
sees the additional 4 gigs and apparently so does FreeBSD but I get this 
during boot.

real memory  = 8589934592 (8192 MB)
avail memory = 3400794112 (3243 MB)

How do I get use of the full 8 gigs?

Thanks,
Frank