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Intel D955XBK does not correctly identify Pentium 965 EE

Dear Experts and Enthusiasts,

I've got a annoying problem that I've seen mentioned on teh NET but have not found a solution...

I've have a D955XBK (current BIOS version 2049 - latest) since 2005 with a Pentium 840 EE. It has served me well for all these years, but I recently decided to give my RIG an upgrade with a Pentium 965 EE, so I bought one on Ebay.

After I swapped the PROC the system booted up fine, the board automatically changed the Bus Speed from 200MHz to 266MHz (Rated FSB as 1066MHz) but it kept the multiplier at the lowest level (12) so the PROC speed ws set to 3.2GHz instead of it's default speed of 3.73GHz. I thought that it may be due to SpeedStep, so I fired up Prime95 and even at full load CPUID showed the multiplier as 12 (consequently speed remained ate 3.2GHz).

Up on reboot I went into the BIOS to see that the BIOS had idenfied the PROC as Intel Pentium...6GHz (yes, SIX Giga hertz), so I went into the advance chipset settings and manually set the multiplier to 14!

After that everything seemed to be OK, BIOS identified s a 3.73GHz CPU... Windows correctly identified the new processor as Genuine Intel CPU 3.73GHz and CPU ID correctly identifies the CPU as Pentium EE Pressler 65nm, etc (see attached image below):

I've left Prime95 running overnight so the setup is stable, but I would really like to be able to let the MOBO automatically set the multiplier, FSB, etc. This article mentions a similar problem http://ixbtlabs.com/articles2/mainboard/intel-d955xbk-i955x.html http://ixbtlabs.com/articles2/mainboard/intel-d955xbk-i955x.html

But it's solution was "after some mysterious "voodoo dances""... Which does not help me.

Any ideias? Thanks in advance...

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Hello g126,

Could you please send me the AA# and Serial of your motherboard? It is necessary to check if your processor is fully compatible to your motherboard.

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Hello Mike_Intel,

Thanks for your reply. I will be able to send you the full SERIAL on Sunday (when I'll next have access to it), but I can tell you now that the REVISION number definitly matches C96732-xxx as stated on http://www.intel.com/support/pt/motherboards/desktop/d955xbk/sb/cs-026574.htm http://www.intel.com/support/motherboards/desktop/d955xbk/sb/cs-026574.htm

Infact, I understand from teh website that inorder for teh 840 to have worked (my previous processor) the revision number hat to match that. But I'll update this discussion with the serial a.s.a.p.

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Hello G126,

I would be waiting your reply with the markings of the processor.

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Hi Mike_Intel,

Do you mean the mobo S/N (markings) or the processor markings? For the processor consider this one:

It's exactly the same except for the S/N at the bottom, which is different (if you really need the exact serial number then tell me as I'll need to remove the Cooler and Thermal Paste - is there a know incompatibility or bug with a lot of the 965 pocessors?).

I'll post a foto of the MOBO S/N over the weekend.

Cheers!

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Hello again mike_intel,

Here we are, serial number is BQBK54800550 and the AA revision number is C96732-406:

 

But now, after running the processor for a bit manually setting the MULTIPLIER at 14, when I put it back into AUTOMATIC it seems to hold at 14 correctly placing the CPU frequency to 3.73 GHz:

In any event, this is now documented in this forum if anyone has the same problem. I'm still puzzled at how the D955XBK was unable to correctly identify the SL9AN (Pentium D 965 EE) and why does the BIOS recognize it as a "Genuine Intel (R) CPU 6.0GHz"? But hey... It's all back on automatic and I'm happy

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