From owner-freebsd-smp Fri Nov 5 10:50:13 1999 Delivered-To: freebsd-smp@freebsd.org Received: from gndrsh.dnsmgr.net (GndRsh.dnsmgr.net [198.145.92.4]) by hub.freebsd.org (Postfix) with ESMTP id 6231B14C84 for ; Fri, 5 Nov 1999 10:50:08 -0800 (PST) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.9.3/8.9.3) id KAA57925; Fri, 5 Nov 1999 10:46:25 -0800 (PST) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <199911051846.KAA57925@gndrsh.dnsmgr.net> Subject: Re: Dual Celeron + FreeBSD? In-Reply-To: <199911051809.KAA25476@mina.sr.hp.com> from Darryl Okahata at "Nov 5, 1999 10:09:46 am" To: darrylo@sr.hp.com (Darryl Okahata) Date: Fri, 5 Nov 1999 10:46:25 -0800 (PST) Cc: freebsd-smp@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > "Rodney W. Grimes" wrote: > > > > These days, I'm not sure dual Celerons make sense. Unless you > > > overclock (which I don't recommend, for all the usual reasons), you're > > > only saving, oh, US$200-$230 compared to a comparable Pentium II-based > > > system. Also, because of the small 128K L2 cache and the 66MHz bus (no > > > overclocking, remember?), dual Celerons aren't as fast as dual P2s. > > > > See other posting on this... real world can;t tell between 128K L2 and > > 256K L2. The 66 vs 100Mhz bus can make a difference, but were doing > > all our Celeron stuff in PPGA370 with slot/1 adapters and running > > the bus at 100Mhz so we are technically overclocking the FSB, but > > leaving the core at normal speed, and thus didn't take that into > > factor when doing our tests. > > Huh? All Celerons are multiplier-locked. How are you able to > decouple the FSB from the core? Arghh.. your right... I just went and hung a scope on the things, I had ignored the fact that the Celeron is ignoring the jumpers and the MB is just doing the right thing by forcing the clock to 66Mhz, even though the jumpers are set to 100Mhz, 4x. Go figure... :-(. Sooo.... even at 66MHz FSB we don't see much of a difference in OUR testing. [I only yelled because I know someone is going to come along with some synthetic benchmark or specific application that shows a huge difference.] -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message