Date: Sat, 14 Aug 1999 11:07:00 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Cc: mike@smith.net.au, freebsd-stable@FreeBSD.ORG Subject: Re: On freezes in 3.2-Stable (fwd) Message-ID: <199908140907.LAA53789@yedi.iaf.nl> In-Reply-To: <199908140046.RAA02542@gndrsh.aac.dev.com> from "Rodney W. Grimes" at "Aug 13, 1999 5:46: 1 pm"
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As Rodney W. Grimes wrote ... > > Er. The Intel AD450NX has 32 DIMM sockets. Unless someone starts > > making 2-chip DIMMs, I don't see how you would run 8GB in this box (and > > I have seen it being done under other operating systems). > > The Intel AD450NX in in the class ``supporting 8 sockets or more''. > The Intel AD450NX is in the class ``high dollar server machines''. > > > > > You might want to qualify the issue a little further; specifically with > > regard to "typical memory controllers", logic families and fanout. > > I think I qualified it plenty enough... > > As far as logic families and fanout, well they really don't matter much > with regards to this issue, memory drivers are special, not made with the > same configuration that the logic family is, and thus it's fanout is > quite different. The constant has been 72 for a very long time, since I > started duing mos memory system designs with 54xx/74xx TTL in the 80's > until today with the latest in CMOS and BiCMOS. Yea.. I could design a > supper honking driver that can drive 288 chips in the memory controller, > but then all the RAM chips would have to have larger data drivers to > handle that side of the bus. You could use buffered DIMMs I guess. Not really PC standard stuff though. -- | / o / / _ Arnhem, The Netherlands - Powered by FreeBSD - |/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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