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
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Hyperthreading: 2 logical CPUs
If you hunt down the right Xeon document:
http://download.intel.com/design/Xeon/specupdt/30240216.pdf
...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
--
-Chuck
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