From owner-freebsd-questions Thu Dec 10 16:16:14 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA14901 for freebsd-questions-outgoing; Thu, 10 Dec 1998 16:16:14 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from helmholtz.salk.edu (helmholtz.salk.edu [198.202.70.34]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA14894 for ; Thu, 10 Dec 1998 16:16:13 -0800 (PST) (envelope-from bartol@salk.edu) Received: from eccles.salk.edu (eccles [198.202.70.120]) by helmholtz.salk.edu (8.7.5/8.7.3) with SMTP id QAA17095; Thu, 10 Dec 1998 16:15:52 -0800 (PST) Date: Thu, 10 Dec 1998 16:15:56 -0800 (PST) From: Tom Bartol To: Greg Lehey cc: freebsd-questions@FreeBSD.ORG, Joel Stiles Subject: Re: Maximum possible RAM with 450NX ? In-Reply-To: <19981211094623.A455@freebie.lemis.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Thanks for the reply! I'm not sure I have the expertise to solve these problems but I'd be willing to be a guinea pig and try my hand at it too! Tom On Fri, 11 Dec 1998, Greg Lehey wrote: > On Thursday, 10 December 1998 at 15:02:48 -0800, Tom Bartol wrote: > > > > Hi all, > > > > We're in the process of writing an NSF research grant proposal in which > > we'd like to ask for 4, Quad CPU Xeon's with 4GB RAM each (i.e. 16 CPU's > > total in 4 machines, 4GB per machine). We have a REAL need for this kind > > of BIG memory (and, as usual, what's BIG today is small potatoes > > tomorrow). Polywell, www.polywell.com, sells just such a 450NX-based > > machine, and AMI has a 450NX-based motherboard which can go to 4GB on one > > board (16 DIMM slots) with the option of a second 4GB board for a total > > of 8GB! Will FreeBSD run (or is it planned to run) on such systems and > > how would it (or WinNT for that matter) access memory above the 4GB limit > > of a 32bit address space? Perhaps the memory in one 4GB chunk is > > accessible on a given processor but not on the others so a Quad CPU > > machine really acts more like two or several machine in the same chassis? > > Any insights would be most welcome. Please respond directly to me as I > > don't monitor the -questions mail list. > > I've heard of problems running 2 GB or more of memory (this is the > point where the total memory size is negative in 32 bit signed > arithmetic). I'm sure that the problems are solvable, but you might > be the one who has to solve them. > > Greg > -- > See complete headers for address, home page and phone numbers > finger grog@lemis.com for PGP public key > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message