They are a matched set ... the stepping is the same. I have 4 operational dual intel CPU systems, plus 5 or 6 dual PII systems, a dual Pentium Pro system as well ... so I have been down that path before. Always good to check the obvious first though. R On Mon, 2006-05-15 at 15:44 -0500, smac at visi.com wrote: > The big question is, are the CPU's a matched set? > > Let Me explain. > > Each CPU must the the same ""Stepping" "(stp)"" in your case... > (stp) etc... > SL6VP 3.06 GHz 533 MHz 0.13 micron D1 512 KB 604 pin > SL6GH 3.06 GHz 533 MHz 0.13 micron C1 512 KB 604 pin > SL6RR 3.06 GHz 533 MHz 0.13 micron C1 512 KB 604 pin > SL6YR 3.06 GHz 533 MHz 0.13 micron D1 512 KB 604 pin > > In other words; > Each CPU must be from the same microcode version. > The stepping is on the CPU itself. > You are lucky you didn't fry the CPU's, if the stepping is off. > > This is the Intel site with the information you need to check. > > http://processorfinder.intel.com/scripts/default.asp?CHRID=528 > > > Sam. > > Quoting Randy Clarksean <rclark at lakesplus.com>: > > > I have had some ongoing issues with a set of dual 3.06 533MHz 512K Xeon > > CPUs. I have just bought a new set of components to build around these > > CPUs that I had in my possession. > > > > ASUS PC-Deluxe MB > > 4 GB RAM > > Dual CPUs (XEON, 3.06 533 MHz 512K) > > FC5 installed OS with raid, LVM > > > > Issue: I built the system, finally have the hard drives configured as I > > want, now ... the system just starts to hang while away, or crashes > > along the way. > > > > A couple of times recently though, during boot I have gotten some CPU > > warnings ... similar to what I have seen in the past. In addition, the > > system will just seem to lock up on occasion. The CPU checks that are > > run at boot time ... shouldn't those errors show up more often, or does > > the phase of the moon sorta thing have to be just right for a crash like > > that to occur? > > > > What is odd though, I ran a couple copies of this heavily intensive CPU > > application (mprime I think it was) ... ran for over 12 hours ... with > > both CPUs buried - no errors, but then some time later the system just > > crashed heavily. > > > > Things I have already considered: > > > > - over heated CPUs ... brand new coolers, used thermal grease - bios > > monitoring shows temps to be reasonable - at least when I can get in to > > check on them. > > - power supply ... bought decent brand, not cheap one. > > - UPS ... plugged into APC 420 SmartUPS (no indication of overload), > > shares this with another tower. > > > > Other thoughts and suggestions? I NEED this system up and running soon > > for work (heavy CPU related activities). > > > > Thanks in advance. > > > > Randy > > > > p.s. Any suggestions on a good location to purchase a matched set of > > these CPUs? I have been looking on the web - pricewatch - and they only > > list single CPUs. These are slightly older technology ... so tougher to > > locate. > > > > > > _______________________________________________ > > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > > tclug-list at mn-linux.org > > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > > > >