Date: Fri, 17 Jun 2011 14:18:53 +0100 From: Graeme Dargie <arab@tangerine-army.co.uk> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: RE: OT: Strange memory reading (hardware) Message-ID: <0EE458C34045A44DBC2CA2DC5CEB42B521F2C52163@mercury.universe.galaxy.lcl> In-Reply-To: <20110616160547.68a628e9@dell64> References: <20110616141030.0f3dc5f3@dell64> <110DEE0E-92A6-4202-B072-0EC5104B839E@mac.com> <20110616160547.68a628e9@dell64>
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-----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@f= reebsd.org] On Behalf Of Robert Sent: 17 June 2011 00:06 To: Chuck Swiger Cc: freebsd-questions@freebsd.org Subject: Re: OT: Strange memory reading (hardware) On Thu, 16 Jun 2011 15:11:22 -0700 Chuck Swiger <cswiger@mac.com> wrote: > On Jun 16, 2011, at 2:10 PM, Robert wrote: > > I have tested with all of the sticks installed and with one at a > > time. When all of the sticks are installed, BIOS show a total of > > 2752 MB of RAM. If any of the sticks are installed alone in any of > > the four slots, BIOS then shows 960 MB instead of the 1024 one > > would expect. >=20 > Sounds like the BIOS is stealing 64MB for video RAM. > There's likely a BIOS setting which governs the size of this. >=20 > As for not being able to access all 4GB, this is a FAQ. > If you run a 32-bit system, the top gigabyte or so of address space is > reserved for memory mapped I/O reservations like AGP, PCIe, etc. >=20 > If your hardware is capable of running in 64-bit mode, do that. >=20 > Regards, Chuck Thanks for the reply. I should have been clearer. During POST only 2752 MB is shown. Also, I am running the amd64 version of freenas. As I said, I am 100% sure this is a MOBO hardware problem and I was just trying to compute the math. Robert _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org= " The BIOS if it has shown 4096mb at post in the past would suggest that it i= s up to date at least enough to deal with 4gb of ram. I would say the likel= y hood of all 4 ram sticks developing the exact same problem at the same ti= me while not impossible is highly unlikely. Do you have another machine you= can test the ram in or stick of ram you can test on this motherboard? Not = sure if your board will let you do this or not, but try 1 stick in bank 1 r= ather than bank 0, and see what it shows, you might also want to repeat the= same test with 1 stick in bank 2 and then in bank 3. Bios settings for on = board video will reserve some ram, some boards report the main ram figure l= ess this figure others do not. You might want to try doing a bios reset wit= h the jumper on the motherboard its self. Also give the ram slots a blow ou= t with some aero duster could be there is some dirt in them. Other than run= ning memtestx86 or the 64bit equivalent I am pretty much out of ideas. Regards Graeme
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