Date: Tue, 1 Oct 1996 09:08:50 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: michaelv@MindBender.serv.net (Michael L. VanLoon -- HeadCandy.com) Cc: narvi@haldjas.folklore.ee, obrien@nuxi.cs.ucdavis.edu, freebsd-hardware@freebsd.org Subject: Re: H/W recommendation Message-ID: <199610011608.JAA19605@GndRsh.aac.dev.com> In-Reply-To: <199610010659.XAA13490@MindBender.serv.net> from "Michael L. VanLoon -- HeadCandy.com" at "Sep 30, 96 11:59:10 pm"
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[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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