Date: Wed, 2 Oct 1996 09:30:42 +0300 (EET DST) From: Narvi <narvi@haldjas.folklore.ee> To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> Cc: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net>, obrien@nuxi.cs.ucdavis.edu, freebsd-hardware@FreeBSD.org Subject: Re: H/W recommendation Message-ID: <Pine.BSF.3.91.961002092932.20679B-100000@haldjas.folklore.ee> In-Reply-To: <199610011608.JAA19605@GndRsh.aac.dev.com>
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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 >
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