From owner-freebsd-hardware Mon Mar 31 11:47:00 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id LAA05931 for hardware-outgoing; Mon, 31 Mar 1997 11:47:00 -0800 (PST) Received: from www2.shoppersnet.com (shoppersnet.com [204.156.152.112]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id LAA05925 for ; Mon, 31 Mar 1997 11:46:57 -0800 (PST) Received: (from hlew@localhost) by www2.shoppersnet.com (8.8.5/8.8.5) id LAA17247; Mon, 31 Mar 1997 11:50:26 -0800 (PST) Date: Mon, 31 Mar 1997 11:50:26 -0800 (PST) From: Howard Lew To: Paul Southworth cc: freebsd-hardware@FreeBSD.org Subject: Re: Crashes with 6x86L-P200+ In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk > The offending processor has the following stamped on it: > > 6x86L-PR200*GP > 150Mhz > 3.3v > Did you check to make sure the motherboard is jumpered for the 2.8V setting (not 3.3V)? The CPU should say on the top: 6x86L-PR200+GP 150MHz Core: 2.8V I/O: 3.3V Fan/Heatsink Required I don't have any info about MTI's MB (because we do not sell it), but the 6x86L parts run at 2.8V instead of 3.3V or 3.52V. The wrong voltage can cause this problem. I think 3.3V is the "absolute worst case" voltage for the chip, so if you are running it at 3.3V this is very bad for the chip and you may get this problem. (You should not jumper the cpu for regular 3.3V). These newer lower voltage Cyrix-L parts require less voltage for I/O, so the complaints about heat are now a thing of the past. They run cool now (actually so cool, that Cyrix no longer even bundles a heatsink-fan with the chip). The other possibility is that I have heard unconfirmed reports that the Adaptec may not be able to run at 37.5MHz bus clock. (See the chips hardware newsgroup). I am not sure if MTI's MB runs sync or async PCI clock. --------------------------------------------------------------------------- Shoppers Network (Support) AMD K5/K6s, Cyrix 6x86, Intel Pentiums/Pro Phone: (415) 759-8584 Email: howard@shoppersnet.com ==============================> WWW - http://www.shoppersnet.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~