Date: Tue, 24 Apr 2007 14:20:08 -0400 From: Bill Moran <wmoran@potentialtech.com> To: "Jonathan Horne" <freebsd@dfwlp.com> Cc: freebsd-questions@freebsd.org Subject: Re: Memory >3.5GB not used? Message-ID: <20070424142008.ae5645ff.wmoran@potentialtech.com> In-Reply-To: <2271.192.168.125.134.1177438307.squirrel@webmail.dfwlp.org> References: <01d301c78699$d6a36820$0300020a@mickey> <20070424140528.95287ff4.wmoran@potentialtech.com> <2271.192.168.125.134.1177438307.squirrel@webmail.dfwlp.org>
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In response to "Jonathan Horne" <freebsd@dfwlp.com>: > > > In response to "Don O'Neil" <lists@lizardhill.com>: > > > >> I just built a new server with an Athlon 64 x2, 4GB Ram and a > >> Gigabyte/Nvidia motherboard. > >> > >> When I boot the system up it says on the console that 532888K will be > >> ignored. > >> > >> Of course it isn't put in any of the log files. Dmesg shows this: > >> > >> real memory = 3724476416 (3551 MB) > >> avail memory = 3649908736 (3480 MB) > >> > >> Any reason the extra 1/2 GB isn't showing up or usable? Is there something I > >> need to specify in the kernel to get to the other 1/2 GB? What if I want to > >> install more than 4GB? This mobo supports up to 16 GB... Do I need to go to > >> the AMD64 platform to get >4GB? > >> > >> I'm running FreeBSD 6.1 i386 SMP kernel. > > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/troubleshoot.html#PAE > > > > i have a system with 4GB memory, doing the same similar behavior. but, on top > of not using the last few hundred megs of ram, even the POST shows like 3.6 or > 3.7GB of ram. is PAE still a solution for my case? > > [jhorne@canopus ~]$ dmesg | grep memory > real memory = 3958833152 (3775 MB) > avail memory = 3875762176 (3696 MB) As noted in the FAQ, this is hardware-dependent. Some crappy motherboards don't remap the memory, and it can not be used as a result. -- Bill Moran http://www.potentialtech.com
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