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 E6x50 overclocking warning, Possible wrong core temperature reading!

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TSkmarc
post Jul 29 2007, 10:52 PM, updated 19y ago

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With my new E6750 and from others who have reported their CPU info, I found that the core temperature reading was not logical.

I have done some researching and found that other people with the E6x50 CPUs are reporting the same problem - inaccurate readings. Apparently due to a new line of CPUs with the G0 stepping.

As such, some has recommended adding another 15'c to the temperature readings due to the higher Tjunction of E6x50 series (From Tjunction of 85'c to 100'c, but for now, nobody knows for sure what the actual value is)

I think this applies to current 3rd party software that reports the core temp, until such time as newer versions appear with the corrected/accurate temperature readings.

So, for those with these nice new E6x50 series, pls be careful if you are overclocking your CPUs.

Here are some links on the discussion:
http://www.overclock.net/intel-cpus/216083...-amazing-2.html
http://www.xtremesystems.org/forums/showthread.php?t=152780
http://forums.anandtech.com/messageview.as...9&enterthread=y
http://www.xtremesystems.org/forums/showthread.php?p=2330285
http://www.hardforum.com/showthread.php?t=1212640

Don't just believe me, do your own research!!! nod.gif

This post has been edited by kmarc: Aug 2 2007, 10:11 PM
sniper69
post Jul 29 2007, 10:54 PM

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hmm.gif, recently bought the E6850 and installed (my friend's), he didn't encounter any problem related... well, i'll ask him right away...
TSkmarc
post Jul 30 2007, 08:44 AM

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QUOTE(sniper69 @ Jul 29 2007, 10:54 PM)
hmm.gif, recently bought the E6850 and installed (my friend's), he didn't encounter any problem related... well, i'll ask him right away...
*
Think about it. The only difference between E6750 and E6700 is the FSB speed (1333Mhz vs 1066Mhz) and stepping (G0 vs B2). Other than that, both are exactly the same especially the TDP and 65nm manufacturing process.

As such, how can the E6750 be so much cooler on stock heatsink as compared to the E6700? rclxub.gif

However, if you look at their specs, apparent the thermal specification for both are also different. E6750 is at 72'c while the E6700 is at 60.1'c (See table below)

This is Intel's definition of thermal specification "Thermal Specification: The thermal specification shown is the maximum case temperature at the maximum Thermal Design Power (TDP) value for that processor. It is measured at the geometric center on the topside of the processor integrated heat spreader. For processors without integrated heat spreaders such as mobile processors, the thermal specification is referred to as the junction temperature (Tj). The maximum junction temperature is defined by an activation of the processor Intel(R) Thermal Monitor. The Intel Thermal Monitor's automatic mode is used to indicate that the maximum TJ has been reached"

Anybody care to explain what thermal specification means in the OC world?

Added : Comparison table - look especially at the thermal specification (maximum case temperature) of E6750 vs 6700 smile.gif

This post has been edited by kmarc: Aug 1 2007, 04:14 PM


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SlayerXT
post Jul 30 2007, 12:17 PM

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So how if we oc the cpu and not reach the max case temperature? It should be safe right?(Not sure bout the core temp though)
t3chn0m4nc3r
post Jul 30 2007, 01:32 PM

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hm... i juz played around wif Celeron 420 on customer's new order... seems very cool on Gigabyte GA-945GCMX-S2... i did't check the temp but the fan rarely spin and the sink is cool... ohmy.gif
TSkmarc
post Jul 30 2007, 03:25 PM

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Wow! Intel's customer support is impressive. Already receive a reply from them!!!

However, it didn't address the issue directly but nevertheless, I'm impressed!

And you can see in the reply that the max core temp is indeed increased compared to previous stepping (E6700). thumbup.gif However, do remember that they are referring to non-overclocked CPUs!!!!

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This post has been edited by kmarc: Jul 30 2007, 03:26 PM
jasonkwk
post Jul 30 2007, 04:07 PM

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ya, my Asus ProbeII give different temperature value with other program.
SlayerXT
post Jul 30 2007, 04:17 PM

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Really brief xplanation u got there. I think the new stepping probably wont get any cooler but will bear maximum case temperature of 74c. Well, hav u contact Gigabyte for the motherboard temperature reading? Or third party software u r using?
TSkmarc
post Jul 30 2007, 04:24 PM

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QUOTE(jasonkwk @ Jul 30 2007, 04:07 PM)
ya, my Asus ProbeII give different temperature value with other program.
*
What is the difference in your temperature reading? At load, my Easytuner5 shows 54'c but TAT/speedfan (core0/1)/core temp shows 48'c.... rclxub.gif

QUOTE(§layerXT @ Jul 30 2007, 04:17 PM)
Really brief xplanation u got there. I think the new stepping probably wont get any cooler but will bear maximum case temperature of 74c. Well, hav u contact Gigabyte for the motherboard temperature reading? Or third party software u r using?
*
Already emailed gigabyte customer support!!! laugh.gif

This post has been edited by kmarc: Jul 30 2007, 04:24 PM
remysix
post Jul 31 2007, 03:37 PM

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just bought a E6850...will surely check it out once installed...just imagine that u keep on pumping vcore and generating more heat while ur software said,"It's find, u can push some more!"...
TSkmarc
post Jul 31 2007, 03:59 PM

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QUOTE(remysix @ Jul 31 2007, 03:37 PM)
just bought a E6850...will surely check it out once installed...just imagine that u keep on pumping vcore and generating more heat while ur software said,"It's find, u can push some more!"...
*
Pls do give some feedback. Wah, you orang kaya aaa.... Q6600 not enough aaa??? rclxub.gif
remysix
post Jul 31 2007, 04:30 PM

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QUOTE(kmarc @ Jul 31 2007, 03:59 PM)
Pls do give some feedback. Wah, you orang kaya aaa.... Q6600 not enough aaa???  rclxub.gif
*
will do that tonite and see how's the temp...
not kaya la bro...that Q6600, passing it to my brother this weekend...since this E6x50 just out, wanna give it a try la biggrin.gif
TSkmarc
post Jul 31 2007, 04:37 PM

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QUOTE(remysix @ Jul 31 2007, 04:30 PM)
will do that tonite and see how's the temp...
not kaya la bro...that Q6600, passing it to my brother this weekend...since this E6x50 just out, wanna give it a try la biggrin.gif
*
That's call kaya la. Like AceCombat, also got quad core but give to brother to use..... laugh.gif
jasonkwk
post Jul 31 2007, 05:19 PM

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anyone know what program to see CPU temperature? the Asus ProbeII really sucks, dont even try use Asus overclock program, keep getting BSOD after using it.
AceCombat
post Jul 31 2007, 05:48 PM


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Just back from my friend's house playing his E6850 and i shocked to see this thread.

running stock speed with core temp reported at 18c....

and it's cold,even i orthos it with stock hsf and stock speed,core temp reported 26c,is the new generation so cool or the temp is really misreading?
victor_hoh
post Jul 31 2007, 05:50 PM

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QUOTE(AceCombat @ Jul 31 2007, 05:48 PM)
Just back from my friend's house playing his E6850 and i shocked to see this thread.

running stock speed with core temp reported at 18c....

and it's cold,even i orthos it with stock hsf and stock speed,core temp reported 26c,is the new generation so cool or the temp is really misreading?
*
definitely misreading lar... u cannot have a processor running lower than ambient temperature.
TSkmarc
post Jul 31 2007, 06:54 PM

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QUOTE(jasonkwk @ Jul 31 2007, 05:19 PM)
anyone know what program to see CPU temperature? the Asus ProbeII really sucks, dont even try use Asus overclock program, keep getting BSOD after using it.
*
There are many programs that you can use, for example:
1) Speedfan
2) Core temp (don't use 0.95 as sometimes causes reboot)
3) Intel's TAT (thermal analysis tool)
4) Everest
5) You own mobo's software

QUOTE(AceCombat @ Jul 31 2007, 05:48 PM)
Just back from my friend's house playing his E6850 and i shocked to see this thread.

running stock speed with core temp reported at 18c....

and it's cold,even i orthos it with stock hsf and stock speed,core temp reported 26c,is the new generation so cool or the temp is really misreading?
*
Yup. Wrong reading la. How can a proc be 26'c on load with stock heatsink??!!?

Still waiting for gigabyte to reply me email....
AceCombat
post Jul 31 2007, 07:20 PM


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well anway,orthos for more than 3 hours and the heat sink is totally cool sweat.gif no heat at all at the sink there.

yup,using core temp 0.94 and speed fan showing the same temp with core temp.
remysix
post Jul 31 2007, 07:22 PM

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QUOTE(AceCombat @ Jul 31 2007, 07:20 PM)
well anway,orthos for more than 3 hours and the heat sink is totally cool sweat.gif no heat at all at the sink there.

yup,using core temp 0.94 and speed fan showing the same temp with core temp.
*
u meant u touched the heatsink it's cool-->not hot?
AceCombat
post Jul 31 2007, 07:27 PM


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yes,excatly,i can make sure the contactivity is good,and this prove that the proc is cool,btw....the mobo is P35 DS3,the chipset is 43c when orthos,(no oc) and the proc is 26 sometime jump to 28 then back to 25-26 like that.

AMAZING!!!!!!!! notworthy.gif
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