Installing 2nd CPU on SMP board
doug at polands.org
Wed Oct 19 17:48:36 PDT 2005
On Wed, Oct 19, 2005 at 07:48:34PM -0400, Chuck Swiger wrote:
> Glenn Dawson wrote:
> >At 03:57 PM 10/19/2005, Kurt Buff wrote:
> [ ... ]
> >>>You want to get the same speed, FSB, and family number of Xeon, and
> >>>it is preferable to get the same stepping number if possible.
> >It's better to match the sSpec numbers...those include the stepping,
> >and not all processors of the same stepping have the same sSpec.
> Intel's documentation for dual-proc and multiproc compatibility is
> based on family ID and stepping #, not on the s-spec #.
> The family ID is akin to a major version number, and the stepping is
> akin to a minor version number. You can get the family ID and
> stepping from dmesg, you cannot get the sSpec number via that
> directly. For example:
> CPU: Intel(R) Xeon(TM) CPU 3.00GHz (2992.71-MHz 686-class CPU)
> Origin = "GenuineIntel" Id = 0xf43 Stepping = 3
> Hyperthreading: 2 logical CPUs
> If you hunt down the right Xeon document:
> ...and search for "0xf43", you get:
> S-Spec CoreStepping CPUID CoreFreq FSB L2_cache ....
> SL7ZF N0 0F43h 3 800 2 MB 604-pin micro-PGA
Thanks for the tip.
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