Date: Tue, 29 Apr 1997 09:12:21 +0200 From: Poul-Henning Kamp <phk@dk.tfs.com> To: brownie@earthling.net Cc: Poul-Henning Kamp <phk@dk.tfs.com>, smp@freebsd.org Subject: Re: Quad Pro 150 motherboard? Message-ID: <1511.862297941@critter> In-Reply-To: Your message of "Mon, 28 Apr 1997 23:12:08 PDT." <33659138.D27@earthling.net>
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In message <33659138.D27@earthling.net>, Chris Browning writes: >> >The PPro's are stackable without additional electronics external >> >to the processor. This makes it a *lot* easier to do multiple >> >CPU's up to large numbers. >> >> The original design was for up to four PP's to be stackable. >> Unfortunately it transpired to not be the case (for reasons >> for signal integrity I belive, and therefore 4*PP cards have >> a number of buffers more than 2*PP cards. > >What are you talking about here? I have never heard anything about >having to add buffers for > 2 PPP designs. Can you point to a >PPP errata for this? I think someone has misinformed you. > >Chris Well, I talked to a couple of people who did speak for Intel, they said that it was close to impossible to get four PP to work on a "plain" PC motherboard, you would have to do the daughterboard+buffer thing... The reasons stated was "termal, electrical & practical"... -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@tfs.com TRW Financial Systems, Inc. Power and ignorance is a disgusting cocktail.
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