From owner-freebsd-questions Thu Dec 14 20:24:28 1995 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id UAA20785 for questions-outgoing; Thu, 14 Dec 1995 20:24:28 -0800 (PST) Received: from nike.efn.org (garcia.efn.org [198.68.17.5]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id UAA20779 for ; Thu, 14 Dec 1995 20:24:23 -0800 (PST) Received: (from gurney_j@localhost) by nike.efn.org (8.6.11/8.6.9) id UAA09064; Thu, 14 Dec 1995 20:25:37 -0800 Date: Thu, 14 Dec 1995 20:25:36 -0800 (PST) From: John-Mark Gurney Reply-To: John-Mark Gurney To: Donald Burr cc: "Alan D. Trombla" , questions@freebsd.org Subject: Re: Upgrade - CPU, clock? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org Precedence: bulk On Thu, 14 Dec 1995, Donald Burr wrote: > On Thu, 14 Dec 1995, Alan D. Trombla wrote: > [...] > > 2. Can I just change the crystal to get a 50MHz system? If so, will > > my ATI GUP handle the faster bus? (There are no other VLB boards.) > > Is my memory (assuming it *is* 70ns) fast enough? > > This *may* or *may not* work. I tend to lean toward the *may not* side. > Overclocking Intel CPU's is spotty, and sometimes they seem to work, only > to crap out on you when your system's been running for X minutes/hours. > If you try, a heat sink and/or CPU fan is **DEFINITELY REQUIRED**. I > once overclocked my DX2/66 to 40 MHz (making it a DX2/80) but the system > wouldn't work because my memory wasn't fast enough (for a 40 MHz bus, you > need 60ns SIMMs... I had 70ns). right now I'm running a i486dx33 at 40mhz... and running 70ns ram at 0w/s if I remeber right... I believe I had to turn of FAST page mode dram though... but I do have a question... I can get a Cyrix (yes I know.. they suck) 80dx2... could I run the chip at 80mhz (my motherboard supports it) but not double it? would there be problems with my IDE vlbus controller? would my isa bus break? from what I have heard about the motherboard doing to slow down of the chip on doubled and tripled chips that the cpu is actually rated at the fast mhz but I don't have the technical background to know... thanks for the help... [...] John-Mark gurney_j@efn.org Modem/FAX: (503) 683-6954 (FreeBSD Box) Live in Peace, destroy Micro$oft, support free software, run FreeBSD (unix) GCS/M/Sd#h+s+!gau-a--w++++vC+++++UF++++P---E---N++W---M--V--Y+t+5++G+b+D++ B----eu+h++!f++n---- CD5OUF++++.L-------2W.DM----N.9---NET2SP3s.2,4s.,4d.2,6---