Date: Mon, 27 Sep 2004 08:46:51 -0700 From: Rob <rob2@pythonemproject.com> To: Joseph Fenton <jlfenton@npgcable.com> Cc: freebsd-amd64@freebsd.org Subject: Re: freebsd i386 on amd64 hardware? Message-ID: <415835EB.9060600@pythonemproject.com> In-Reply-To: <41577570.6020000@npgcable.com> References: <20040924210947.GC6597@iib.unsam.edu.ar> <20040926024730.GA2530@dragon.nuxi.com> <415753BD.2040107@pythonemproject.com> <4157637F.9090009@error404.nls.net> <41577570.6020000@npgcable.com>
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Joseph Fenton wrote: > Ketrien I. Saihr-Kesenchedra wrote: > >> >> Bearing in mind that I don't work for AMD, my understanding is that >> AMD has always planned on three sockets for the Athlon64 - 754 (single >> channel), originally because it can be put on a 5-layer PCB. Socket >> 940 for Opterons for dual channel, but requiring a 6-layer PCB. And >> Socket 939 because that one less pin allows for 5-layer PCBs and dual >> channel. > > > The 754 socket (one HT port and single-channel mem) was destined for > laptops. The 940 (three HT ports and dual-channel mem) needs the extra > layers for proper operation. The 939 keeps the dual-channel, but replaces > two of the HT ports with extra power and ground pins. All the extra power > and ground pins means less current surge and therefore needs fewer layers. > Making it one pin less keeps you from accidentally sticking it in the wrong > socket. > > _______________________________________________ > freebsd-amd64@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 > To unsubscribe, send any mail to "freebsd-amd64-unsubscribe@freebsd.org" > Thanks guys for the clarification. Rob.home | help
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