do I need CPUs with matching S-codes for SMP or is the cpuid enough?

[spyordie007]

I'm looking to add a 2nd P3 1.13ghz/512k CPU to one of my servers. I havent pulled the existing one yet to review the stepping however I have verified what it is with cupid.

Looking at Intel's specs on the P3s it looks like there are 3 differant steppings for the 1.13s with 512k; all of them have the same cpuid:
http://www.intel.com/design/PentiumIII/qit/update.pdf
(SL5PU, SL5LV and SL5LV)

My question is if anyone knows if I have to find another one with matched stepping or if I find another one of the 2 if they will work together SMP. These are getting harder to find so it would be much easier if I could grab any of the 3 rather than finding an exact stepping match.

Thanks in advance,
Erik

 

[spyordie007]

bump

 

[BigBadBiologist]

Intel has always reccomended using matching steppings on dual CPU setups. I've used different steppings on dual setups before and it has been fine. One thing to note in the pdf you referenced, the SL codes are different, but the stepping codes are the same, so they should all theoretically work together.

One note, I may be wrong here, but I thought that the only tualatin CPUs that work in dual mode are the tualatin-S cpus. But maybe all 512k cache versions were S.

 

[spyordie007]

that PDF that I posted indicates that all 3 of them are the s's (listed under the speed).

 

[spyordie007]

anyone else?

 

[LTC8K6]

They should all work as long as they are the same family, as far as I know.
According to Intel, you can mix and match all sorts of speeds and cache sizes, but the two will run at the lower speed.