From owner-freebsd-stable@FreeBSD.ORG Wed Mar 30 22:44:48 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7B34B16A4D5; Wed, 30 Mar 2005 22:44:48 +0000 (GMT) Received: from blackwater.lemis.com (wantadilla.lemis.com [192.109.197.135]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4438C43D53; Wed, 30 Mar 2005 22:44:47 +0000 (GMT) (envelope-from grog@lemis.com) Received: by blackwater.lemis.com (Postfix, from userid 1004) id 37F288564D; Thu, 31 Mar 2005 08:14:45 +0930 (CST) Date: Thu, 31 Mar 2005 08:14:45 +0930 From: Greg 'groggy' Lehey To: Steve Kargl Message-ID: <20050330224445.GW84137@wantadilla.lemis.com> References: <20050330222439.GU84137@wantadilla.lemis.com> <20050330223546.GA4705@troutmask.apl.washington.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="BkCcXYe/IK2urb/q" Content-Disposition: inline In-Reply-To: <20050330223546.GA4705@troutmask.apl.washington.edu> User-Agent: Mutt/1.4.2.1i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 cc: FreeBSD Stable Users cc: FreeBSD-amd64@freebsd.org Subject: Re: Problems with AMD64 and 8 GB RAM? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Mar 2005 22:44:48 -0000 --BkCcXYe/IK2urb/q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wednesday, 30 March 2005 at 14:35:46 -0800, Steve Kargl wrote: > On Thu, Mar 31, 2005 at 07:54:39AM +0930, Greg 'groggy' Lehey wrote: >> None of these problems occur when I use 4 GB memory. About the only >> strangeness, which seems to come from the BIOS, is that it recognizes >> only 3.5 GB. If I put all DIMMS in, it recognizes the full 8 GB >> memory. >> >> I realize that this isn't enough to diagnose the problem. The reason >> for this message now is to ask: >> >> 1. Has anybody else seen this problem? >> 2. Has anybody else used this hardware configuration and *not* seen >> this problem? >> 3. Where should I look next? > > Have you run sysutils/memtest86 with the 8 GB? Heh. Difficult when the system doesn't run. > I had 4 bad out of 12 tested where the DIMMs were Crucial PC2700 2GB > Reg. ECC DIMMs. OK, this makes sense. It might also explain why the 4 GB configuration only recognizes 3.5 GB. Greg -- See complete headers for address and phone numbers. --BkCcXYe/IK2urb/q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFCSyvdIubykFB6QiMRAqEMAJ4rCxVHAHy62OIXn5Q2ENeOKXozVACgrWqZ UT4k8Ij7ChT8g0yUZ6UmBjQ= =zVJ2 -----END PGP SIGNATURE----- --BkCcXYe/IK2urb/q--