E8600 on Asus P5B Deluxe 1238

[QF005]

Hi !

I recently updated my CPU to a C2D E8600 (E0) on my Asus P5B Deluxe. Therefore I had to update my Bios to v1238, which is a beta (for FSB1333 CPU support) but the only one that supports the E8600 on that board (and I fear the last one). In other forums this combination of CPU/board/Bios is reported to work stable with no probs and so it is basically in my case. The only issue I have is that core temp (99.5) is reporting a stable CPU temp of 38 °C (both cores), regardless of CPU load (same temp in idle or running prime95 for and hour). I have a scythe mugen 2, which is a good cooler, but, although I would enjoy it , I just cannot believe it keeps core temps at 38 °C under full load !
I heard that there are issues with core temp after bios update.... So are there any known issues with my setup or with cpu update in general or even the 1238 Asus Bios ? Just to clearify, I did not reinstall XP 32bit after CPU upgrade because I did not change the MoBo, just the bios and switched from a C2D (E6600) to another C2D. All I did was uninstalling the WinXP cpu drivers and let them reinstall by windows (indicated correct as E8600 @3333 Mhz now in device manager).
BTW I had to reload my bios defaults after update, so I´m not shure if I changed some important bios settings for core temp to work (which features have to be necessarily activated ?). And furthermore, temp indications in bios hardware monitor and PC Probe II (Asus programm) seem to work well (indicating 32 °C idle and ~ 47-51 °C on full cpu load).

Thanks for help !!

Cheers

Steve

[The Coolest]

There are no known issues with Core Temp or certain BIOS versions when it comes to Intel processors, at least as far as I am aware.
Some CPUs simply have a broken thermal sensor, so it doesn't work properly at low temperature and only kicks in when CPU temp gets high.

[QF005]

Ok, thanks. So that means if I can not get the DTS to change from that fixed 38 °C it can only mean that they are either broken or I´m not generating enough heat to pass the temp-threshold for the DTS to start working at, right ? There are no relevant bios or windows settings I could have forgotten ?
BTW, do you know if a delayed or broken DTS is a reason to get a refund or a new cpu ? Since I bought this chip for OC I don´t feel good about it...

EDIT: Nevermind, got it now. It took 1,4V vCore and InterBurnTest to excess 39 °C , core temp indication work perfect above that temp (zero difference between the cores ). Therefore the chips doesn´t seem to be that bad, especially cause it´s working wit 1,065 vCore at standard core speed for hours with prime95/orthos. Good OC perspective and cooling capacity I guess definitely more than I expected...

Cheers
Steve

[The Coolest]

Glad to see that you figured it out, and yes, your initial assumption in the post was correct.
This is usually called the "sticky sensors" syndrome, and it's pretty common in 45nm Intel chips.
Also as far as I know, this is not a "good enough" reason for Intel to accept an RMA for the processor.

[Intrinsic]

Hi there,

I think i may be having the same issue as the OP but with E8500 and Maximus II Formula but would like to confirm as i've been wary of OCing it incase i fry something.

Here is an example of my temps to show the issue:

I started with one MIIF machine which was using an SLAPK(C0) E8500 and the temps for each core went up and down as i'd expect. Then after a few months the CPU died(wasn't even OC'd) and so i RMA'd it and got back an SBL9K(E0). I put it in and that is when i noticed that the core temps differed as shown above in the screenshot. So i thought something on the mobo may have been effected by the other CPU dying, but seeing as everything else worked fine i didn't RMA it.
A few months ago i built up another MIIF machine with an SBL9K(E0) and again to my surprise it had exactly the same core temp issue, so i wasn't too sure what to think, beyond it being a BIOS issue or possibly a bug in the mobo itself. But from what i understand from reading this thread it's possibly nothing to worry about? so i should be safe to OC it? as that screenie above is from my machine running under Prime95 and the temps i'd guess are good.

Many thanks for any info.

Regards,
Intrinsic