Multi CPU's Not the same revision

I get this line in the event viewer / system that it calls an application pop-up:

"The CPUs in this multiprocessor system are not all the same revision level. To use all processors the operating system restricts itself to the features of the least capable processor in the system. Should problems occur with this system, contact the CPU manufacturer to see if this mix of processors is supported."

It looks like this happens when I boot the machine up every day.

I read something about the bios memory being corrupt causes this but I cant find the article. I am having no problems with my machine. Everything is working fine. I am running an ASUS M3A79T-Deluxe mobo and an AMD Phenom X4 9850 Black Edition Revision DR-B3 and Stepping 3.
Any ideas as to why this is happening?

Thanks

 

There are two models of Phenom X4 9850 listed as compatible with that motherboard. Check that covers your model, otherwise it is not supported.
http://support.asus.com/cpusupport/cpusupport.aspx?model=M3A79-T Deluxe
One requires PCB 1.01G (the motherboard revision).

Matt

 

Thanks for your responses
I do use cpuz and it shows all cores having the same revision and identified identically
The bios is the latest version (#602) posted on the ASUS support page.
My cpu is listed and the motherboard pcb is since 1.01G
Everything as far as I can tell is correct and/or compatible. This error report was not coming up originally when I assembled the machine. I can't tell when I started but it was within the last month. The only thing I have changed in it are the video drivers since I built it. Any other suggestions are appreciated.
Thank you

 

After upgrading the BIOS, the instructions usually state to make the selection "default settings ". You might want to check.

 

Thanks again I've been putting off talking to both ASUS and AMD about this because I feel the problem is caused by something else. What that is I don't have a clue because as I said the only thing that has changed in the machine are the video drivers. I have tried reinstalling the older drivers too.
I upgraded the bios when I first installed the mobo and this problem did not arise until at least a month after that. I did set everything to the default value on the first boot with the new bios.
I guess I'm going to have to see what ASUS and/or AMD says. If anything else comes to mind please post it.
Thank you

 

I get nowhere with AMD I have to call them and it's impossible to get through. I did find the web page with the corrupt bios suggestion. It is here http://searchwindowsserver.techtarget.com/tip/0,289483,sid68_gci1040175,00.html

I'm going to give it a shot and see what happens.

 

I found the cause! Its the Advanced Clock Calibration setting. If it is disabled I do not get the mismatch event. Next is to find out why this is happening. I'll post an update when I know more.

 

Haven't seen that setting before but I think it adjusts the clock frequencies of individual cores which is causing the problem.

In your case since you only have one physical CPU, the revision problem should not occur.

 

You are correct about ACC adjusting individual core clock frequencies. It gives the option to do all the cores together, individually, auto, and disabled. But what else it does is somewhat of a mystery according to what I've read about it. Why would XP see different clock frequencies between multi cores as a revision problem?

 

No idea frankly speaking.

In 20+ machines of Phenom I have built I haven't faced this kind of problem [yet]. Cool n Quiet also does the same thing, but though it slows down the system, it does not throws up this kind of error. Maybe this setting does more & XP doesn't like it.

Have you checked for updated CPU driver from AMD site ?

 

yes I have the latest driver they offer although it's not that new (2007 I think) I can't find any other posts anywhere regarding this problem either. I did find the corrupt bios thread I posted but that didn't help me. I am really leaning toward a faulty mobo now. I am thinking that it is sending XP the wrong info. due to a defect of some sort. I am not trained in this field so I am really just going from past experience and guessing. I did try the AMD overdrive utility. You can enable all the features of ACC through windows with it. Same results though. Another point I think I left out is that even though I'm getting the event in question here the system runs fantastic. It is rock solid no matter what I throw at it. Plus I can definatly tell the difference with ACC off. It is just a bit slower and not as smooth in gaming compared to with it enabled. Maybe SP 3 will correct this problem. I haven't updated to SP-3 because of some minor gaming issues.

 

Try disabling Cool n Quiet. It also creates problems in some situations.

 

From long time problems, I just don't install it. So I have not had experiences with it for quite a while

Cool n Quiet depends on a good set of drivers in the operating system. If you have added service packs, you might need updates. I have seen BIOS updates relating to C'n'Q. Something to investigate.

Matt

 

it is disabled I even uninstalled the c & q program along with the drivers

 

If there are no apparent problems & machine is working ok, I would rather leave the error as it is. No point in worrying about an entry in event log.

 

Advanced Clock Calibrations is AMD ways of overclocking Phenom CPUs on SB750 chip board .

More details http://www.nordichardware.com/news,7982.html

 

I read that during my search for a cure to this "problem" I am experiencing. My mobo does have the SB750 chip and my 9850 BE does overclock up to 3.1 Ghz (from 2.5) without any thing but a multiplier change (12.5 to 15.5) and ACC set to AUTO. As far as just ignoring the problem. I can't bring myself to do that It's the perfectionist in me I guess. There is something causing it and it is not very common because I cant find another mention of it anywhere so far. For now that is my only option but I will continue to search for a cause just because. I may RMA the mobo but what I really need to do first is try the CPU on another SB750 board to make sure its not the CPU. Only problem with that is I don't have access to another one.

 

Hockalugie when you overclock the computer, you should be ready for such problems. Either don't overclock so much or ignore it.