From owner-freebsd-hardware Mon Sep 15 20:15:59 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id UAA16600 for hardware-outgoing; Mon, 15 Sep 1997 20:15:59 -0700 (PDT) Received: from GndRsh.aac.dev.com (GndRsh.aac.dev.com [198.145.92.241] (may be forged)) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id UAA16595 for ; Mon, 15 Sep 1997 20:15:56 -0700 (PDT) Received: (from rgrimes@localhost) by GndRsh.aac.dev.com (8.8.5/8.7.3) id UAA05832; Mon, 15 Sep 1997 20:15:19 -0700 (PDT) From: "Rodney W. Grimes" Message-Id: <199709160315.UAA05832@GndRsh.aac.dev.com> Subject: Re: Parity trouble with Asus mainboard In-Reply-To: from Doug Russell at "Sep 15, 97 12:47:13 pm" To: drussell@saturn-tech.com (Doug Russell) Date: Mon, 15 Sep 1997 20:15:19 -0700 (PDT) Cc: maddox@p-1.Eng.Sun.COM, beckmann@nacamar.net, hardware@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL25 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > > > Are you sure these are true parity SIMMs? Some cheap SIMMs use "logic > > parity", which just fakes a parity bit for older MBs that require it. > > These will not work with ECC, and should be avoided in any case. > > Also, you describe these SIMMs as 2 x 32, 8 x 32 and so forth. In > > standard nomenclature, the "32" is the width of the SIMM, i.e., 32 bits. > > Parity SIMMs are 2 x 36, etc. > > > > Admittedly, this doesn't explain why the Gigabyte board worked, unless > > somehow the ECC was disabled behind your back. > > It is quite possible that the Gigabyte automatically disables ECC if you > don't actually have parity memory installed as an "idiot-proof" type > feature. I honestly don't know for sure, though. > Awards standard BIOS does this, Gigabyte uses Awards BIOS with very few modifications. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation, Inc. Reliable computers for FreeBSD