Date: Wed, 16 Feb 2005 07:47:14 +0100 From: Lars Tunkrans <lars.tunkrans@bredband.net> To: freebsd-amd64@freebsd.org Subject: Re: NVidia chipsets (was Re: Any experience with "AsusA8N-SLi"or"Gigabyte K8NXP-SLI" mobos?) Message-ID: <4212EC72.4030505@bredband.net> In-Reply-To: <20050216032425.GB2966@dragon.nuxi.com> References: <20050208193338.6ee460d9.mark@hyow.eu.org> <20050215113649.7bfcb1cd.mark@hyow.eu.org> <20050215180011.GD38158@dragon.nuxi.com> <4212868E.8080005@transactionware.com> <20050215235358.GC96584@dragon.nuxi.com> <42129E66.5090903@transactionware.com> <2fd864e050215181374d2e2b1@mail.gmail.com> <20050216032425.GB2966@dragon.nuxi.com>
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David O'Brien wrote: > On Tue, Feb 15, 2005 at 08:13:30PM -0600, Astrodog wrote: > >>On Wed, 16 Feb 2005 12:14:14 +1100, Jan Mikkelsen >><janm@transactionware.com> wrote: >> >>I'm not sure anyone but AMD makes SMP-capible chipsets for Opteron. > > Note that the HP dual-processor workstation doesn't use the AMD chipset, > yet is MP. (Opteron's also aren't SMP, but are a NUMA architecture) > NUMA is the opposite of UMA ( Uniform Memory Architecture) not the opposite of SMP. I see SMP as an oppsite of GRID-clusters like Beowulf. These days a NUMA architecture is radically faster than a UMA architecture ( like INTEL PC's ) because the time to transfer data to/from RAM is 50 NS on an Opteron board compared to 90 NS on an Pentium/frontside-bus board. Anyone, 10 years ago, saying that NUMA is faster than UMA would have been looked at as out of his mind. //Lars
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