From owner-freebsd-hardware Tue Oct 1 23:32:28 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id XAA11510 for hardware-outgoing; Tue, 1 Oct 1996 23:32:28 -0700 (PDT) Received: from haldjas.folklore.ee (Haldjas.folklore.ee [193.40.6.121]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id XAA11500 for ; Tue, 1 Oct 1996 23:32:23 -0700 (PDT) Received: (from narvi@localhost) by haldjas.folklore.ee (8.7.5/8.6.12) id JAA20956; Wed, 2 Oct 1996 09:30:42 +0300 (EET DST) Date: Wed, 2 Oct 1996 09:30:42 +0300 (EET DST) From: Narvi To: "Rodney W. Grimes" cc: "Michael L. VanLoon -- HeadCandy.com" , obrien@nuxi.cs.ucdavis.edu, freebsd-hardware@FreeBSD.org Subject: Re: H/W recommendation In-Reply-To: <199610011608.JAA19605@GndRsh.aac.dev.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk How about submitting this for inclusion into the hardware part of the FreeBSD handbook? It could, of course, include some words on the PPros. Sander On Tue, 1 Oct 1996, Rodney W. Grimes wrote: > [Wack] > > To clarify: > > > > Even Memory PCI bus > > Multiple bus speed speed > > MHz MHz MHz > > -------- --------- ------- > > 33.3 66.67 33.3 > > 30.0 60.00 30.0 > > 25.0 50.00 25.0 > > If you guys are going to talk about this at least get the FACTS right > before you make 3 or 4 erronious posts... ``Even multiplier misses > the fact that there are 1.5, and 2.5 multipliers!!!''. Memory bus > speed should generally not be specified with 2 digits beyond the > decimal point as it depends heavely on the clock chip and/or oscillator > used in a design. > > Here, express it the way that most motherboard documents do: > > Rated External Clock External to PCI Bus > CPU and Memory Bus Internal Clock Clock > MHZ MHZ** Multiplier MHZ > > 75 50 1.5 25 > 90 60 1.5 30 > 100 50* 2 25 > 100 66 1.5 33 > 120 60 2 30 > 133 66 2 33 > 150 60 2.5 30 > 166 66 2.5 33 > 180 60 3 30 > 200 66 3 33 > > * The Pentium 100 can be run at either 50MHz external clock with a > multiplier of 2 or 66MHz and a multiplier of 1.5. > > ** 66 Mhz may actually be 66.667 MHz, but don't assume so. > > As can be seen the best parts to be using are the 100, 133, 166 and 200, > with the exception that at a mulitplier of 3 the CPU starves for memory. > > -- > Rod Grimes rgrimes@gndrsh.aac.dev.com > Accurate Automation Company Reliable computers for FreeBSD >