Date: Mon, 28 Jul 1997 21:09:06 -0600 (MDT) From: FreeBSD Development <freebsd@atipa.com> To: Kevin Van Maren <vanmaren@fast.cs.utah.edu> Cc: perlsta@sunyit.edu, freebsd-smp@FreeBSD.ORG Subject: Re: SMP? (fwd) Message-ID: <Pine.BSF.3.91.970728210412.25478A-100000@dot.ishiboo.com> In-Reply-To: <199707290024.SAA20217@fast.cs.utah.edu>
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On Mon, 28 Jul 1997, Kevin Van Maren wrote: > Mixing CPUs? Yes and no. It should be possible, but the CPUs really > should be the same `stepping'. This isn't possible with a MMX and a > non-MMX processor, as the Core voltages are different (and motherboard > manufacturers only provide one voltage selection mechanism, as well > as one clock-selecting mechanism -- theoretically you can run the > CPUs are differnt speeds as long as the BUS speed is the same). > We sell several boards, and the only possible "yes" situation I can think of would be top mix a 256K and 512K PPro. I can not think of any other viable mix. Each board has only one setting each for bus frequency, clock multiplier, and voltage. Only Intel CPUs are SMP compliant (no K5, K6, Cyrix, etc.). AMD claims they are developing an open multiprocessor spec, but it has not yet been finalized or implemented. Kevin
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