From owner-freebsd-hardware Sun Sep 20 04:27:22 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id EAA07695 for freebsd-hardware-outgoing; Sun, 20 Sep 1998 04:27:22 -0700 (PDT) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from control.colossus.dyn.ml.org (206-18-115-80.la.inreach.net [206.18.115.80]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id EAA07510 for ; Sun, 20 Sep 1998 04:25:48 -0700 (PDT) (envelope-from dburr@colossus.dyn.ml.org) Received: (from dburr@localhost) by control.colossus.dyn.ml.org (8.8.8/8.8.8) id EAA22093 for freebsd-hardware@freebsd.org; Sun, 20 Sep 1998 04:21:29 -0700 (PDT) (envelope-from dburr) Message-ID: X-Mailer: XFMail 1.3 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Sun, 20 Sep 1998 04:21:29 -0700 (PDT) Organization: Computer Help From: Donald Burr To: FreeBSD Hardware Subject: UNDER-clocking Cyrix 6x86MX-PR233 at 66x2.5 instead of 75x2.5? OK? Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I just put together a new system (I bought it piecemeal: motherboard from Company A, CPU from company B, etc. and slapped it together myself) The motherboard uses the Intel i430TX chipset, and the processor I am using is an IBM/Cyrix 6x86MX-PR233. At first, I tried setting up the system the way the processor was marked, namely 75MHz bus speed, 2.5x clock multiplier, 2.9v. But I got random crashes, and the system was otherwise unstable. I have heard that some systems/boards/peripherals can't take the higher 75MHz bus speed, so I tried moving the bus speed down to 66 MHz, and left everything else as is (clock multiplier, etc.) Now the CPU is detected as a 6x86MX-PR200, and everything works perfectly. Since it seems to work OK now, I think I'll keep it set up this way. I just wanted to make sure if it's OK to "UNDER-clock" the CPU like this -- will doing this damage the CPU or motherboard or anything? Please reply by email &/or to the list. Thanks! --- Donald Burr *NEW EMAIL ADDRESS!* | PGP: Your WWW HomePage: http://DonaldBurr.base.org/ ICQ#16997506 | right to Address: P.O. Box 91212, Santa Barbara, CA 93190-1212 | 'Net privacy. Phone: (805) 957-9666 FAX: (800) 492-5954 | USE IT. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message