CPU-Z shows 1 core for E6600?

[SurlyPlatypus]

Hello Everyone,

I've been playing with my Asus P5B Deluxe Wi/Fi. I overclocked to 3.7 and it seemed to be stable. I was playing BF2142 for about 2 ours and all of a sudden my PC Probe alams go off. The CPU temp jumped to 85c. My alarm is set for 55c. I exited quickly, reset all BIOS 0804 setting to default and went back into window. Now both Speedfan and CPU-Z only see 1 core (see attached pic). The BIOS does see 2 Processors.

Any ideas why Speedfan/CPU-Z/Orthos now only see 1 core?

Anyone else ever see this?

System:
E6600
Tuniq T120
2-512mg, DDR28500

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I just figured this out. I also was installing MBM monitoring prior to the crash. Windows wouldn't boot due to that so I repaired windows and I'm now back to SP1. I think that CUPZ etc need updated SP2 or other windows components... Updating now to see.

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Check that...

I'm now at SP2 etc. etc. Still only seeing 1 Core...

Any Ideas?

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Another update...

This is what 3DMark06 shows:

Physical / Logical CPUs = 1 / 1

MultiCore = 2 Processor Cores

HyperThreading = Available Disabled


This is what is showed when both cores were working:

Physical / Logical CPUs = 1 / 2

MultiCore = 2 Processor Cores

HyperThreading = N/A

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[SurlyPlatypus]

I wanted to give a quick update in case someone has this same issue in the future. I RMA'ed my CPU thinking that it was a burned out core. I got the new E6600 over the Sunday and yesterday getting everything set back up. Guess what... Same issue. I re-installed XP and that cured the issue of seeing only one core!! It must have been installing MBM that changed something low level in the OS. This new chip seems to be much more temperamental... I'm stuck at 311x9 and things seem really shaky. I ran Othros for 7+ hours with no errors but would hate it if I was stuck so low with this chip... more testing to go.

[GoriLLakoS]

When you are booting and in bios you can see 1 core or 2?

[sbinh]

It happened to me before .... and I only reset BIOS, then reseat RAM(s) ..

[SurlyPlatypus]

Interesting. Prior to RMA's the chip. I did reset the BIOS to all defaults. No effect. The bios reported 2 cores but the OS only saw one core with one thread. It was really weird.

Now everything is seeing 2 cores and treads. BUT only after a full re-install of XP.

However the tweeking on this new chip seems really harder to get any good over clock.