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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
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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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
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
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
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
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....
TSkmarc
post Jul 31 2007, 07:29 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.
*
So, idle temp is 19'c and load is 26'c? Impossible!!! What's was the ambient temperature?

Something is definitely not right. Is the stock heatsink seated properly? Even now on my stock heatsink doing 2x single-client orthos at 3.2Ghz at 1.35v, the heatsink feels slightly warm and Easytuner5 shows core temp of 47'c. If I run orthos, the core temp will go up to 55'c and the heatsink will feel hot.....
TSkmarc
post Aug 1 2007, 04:12 PM

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QUOTE(remysix @ Aug 1 2007, 09:01 AM)
installed the E6850...
run the OCCT at 3.6G@1.45v/1.44vdroop...
i have 3 temp reading software running: EasyTuner5, CoreTemp and Speedfan as per pic attached. dunno whether can believe or not the reading but seems valid enuff. btw, my E6850 has the Tjunction of 85c not 100c like other guys
[attachmentid=270568]
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That's exactly what my rig is showing. Easytuner5 showing 6'c higher than core0/1, like yours. Speedfan also exactly the same readings (6'c difference). If you use Intel's TAT, it will also show 6'c lower.....

For now, I'm just using Easytuner's CPU temp to gauge my core temperature.

Remember that current apps still do not officially support Intel's new E6x50 series as they were written prior to the introduction of these new CPUs. As such, nobody yet knows what is the Tjunction of the E6x50 series. For all we know, it could still be 85'c!!!

However, I think the Tjunction for these new proc are higher due to their higher thermal specification (Maximum case temperature). See below - compare E6700 and E6750, which are exactly the same proc except for steppings and FSB.

QUOTE(§layerXT @ Aug 1 2007, 01:52 PM)
I wonder if Q6600 G0 stepping will gone the same temperature reading problem. hmm.gif
*
Same thing with the Q6600 G0 stepping. They are supposed to have a Tjunction of 100'c instead of 85'c. That's what I understand from the hyperlinks in the 1st post......

This post has been edited by kmarc: Aug 1 2007, 04:43 PM


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TSkmarc
post Aug 1 2007, 08:06 PM

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QUOTE(t3chn0m4nc3r @ Aug 1 2007, 07:42 PM)
seems like G0 is a reject to all OC'ers... blink.gif  Thank god i didn't get E6750 which i almost got... i'll be playing wif Conroe-L while waiting for Penryn... whistling.gif
*
blink.gif blink.gif Care to provide some links on that statement? The E6750 has a thermal specification of 72'c as compared to the 6700 which is only 60'c la sweat.gif
TSkmarc
post Aug 1 2007, 10:02 PM

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QUOTE(Mr.Lonely @ Aug 1 2007, 09:48 PM)
i just bought my E6750 OCed 3.06Ghz with avarage temp. 53C and full load 60C
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Close casing? What software are you using to monitor the core temp? What's your vcore?

Here's what I managed to do so far (my rig no casing):
Orthos stable at 3280Mhz at stock vcore (1.35v) but core temp goes up to 55'c (stock heatsink)
Orthos fail at 3320Mhz at stock
If vcore 1.40v, core temp goes up to 60'c - too high for me!!!

Still awaiting gigabyte to reply my email though....
TSkmarc
post Aug 2 2007, 11:03 AM

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QUOTE(remysix @ Aug 2 2007, 10:20 AM)
i dun think G0 is 'a reject to all OC'ers'...the problem is that current apps cannot correctly detect the coretemp...in terms of oc wise, so far it's quite good...running my E6850 at 3.6G wif 1.44vdroop...so, for daily usage, i'm satisfied wif it...
*
Ya lo. Simply say oni. Anyway, a new review (in anandtech or xbitlabs) showed that the E6750 can run at a stunning 4.1Ghz (I think, can't remember, working now.... but still can loyer loyer in LYN!!!)

I believe the incorrect temperature is only temporary. As soon as 3rd party softwares supports the E6x50 series, I'm sure the softwares will give a proper core temp.... smile.gif

IINM, the E6850 can do 3.6g at stock vcore, can't it?

QUOTE(VT-Ten @ Aug 2 2007, 10:31 AM)
priming my e6850 at 3.6G with 1.41vcore. pencil mod done. will continue to lower the vcore until system unstable. then that would be my daily use setting.
*
What type of pencil mod did you do? hmm.gif
TSkmarc
post Aug 2 2007, 02:37 PM

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QUOTE(VT-Ten @ Aug 2 2007, 12:04 PM)
was doing 450x8. 400x9 setting cant make it, orthos keeps failing. my rig will hv bsod when boot at 3.6G with stock vcore sad.gif

pencil mod both vdroop and vcore resistors. was experiencing 0.04vdroop before this. now no more vdroop.
*
Wah, so good. My mobo's giving me a 0.03v vdroop! sad.gif So which app are you using to monitor your core temperature?

QUOTE(remysix @ Aug 2 2007, 12:13 PM)
same here...i oso testing wif 450x8...i'm targeting to have it run at 3.6 wif 1.4 or less vcore...hopefully can lar
*
Same question : Which app are you using?
TSkmarc
post Aug 3 2007, 06:22 PM

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Wrote to Intel again to request any info on the Tjunction of the E6x50 series. The link they gave was not that helpful. See below....

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» Click to show Spoiler - click again to hide... «


Again, I'm impress with their response time. As for gigabyte, it has been already a week and no reply from them at all!!!!
TSkmarc
post Aug 4 2007, 02:00 AM

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QUOTE(HaHaNoCluE @ Aug 4 2007, 01:57 AM)
kmarc was asking about the cpu core temp n not about oc rite???
*
Yup. I emailed gigabyte regarding the CPU core temp to see whether gigabyte's mobo can read the temperature of the new E6x50 series accurately or not. It's been 5 days a still no reply. mad.gif

In that time period, my email to Intel has been replied 3 times!!! rclxms.gif
TSkmarc
post Aug 4 2007, 07:48 PM

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QUOTE(VT-Ten @ Aug 4 2007, 09:31 AM)
i reckon they'll take 2 weeks to process your question and they answer you in just a few lines of words, which doesn't answer to your question at all.
happens to me before.
*
Haiyaa..... I've been doing more reading and it seems that everybody is recommending adding 15'c to the core temperature in apps like core temp and Intel TAT.

This is assuming that the Tjunction was increased to 100'c from 85'c! Nobody actually knows whether this is true or not.

Really frustrating!!! vmad.gif
TSkmarc
post Aug 7 2007, 07:57 PM

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QUOTE(gsan @ Aug 7 2007, 07:52 PM)
G0 stepping  whistling.gif
Hey, long time no see! Where did you disappear off to? New rig?
TSkmarc
post Aug 7 2007, 10:10 PM

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QUOTE(gsan @ Aug 7 2007, 08:37 PM)
haha... that's my friend's new setup, i'm still stick with s939 X2  laugh.gif
*
Don't you think it is time to upgrade? Even I have already upgraded after holding on to my AMD rig for so long!!!

I find that DDR2 + PCI-E parts are much cheaper too!!!

Now waiting for my new air-cooler before I OC my E6750!!! nod.gif
TSkmarc
post Aug 7 2007, 10:26 PM

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QUOTE(antudegil @ Aug 7 2007, 10:18 PM)
wahhh... confirm want to OC kaw2 if u waiting for your new air-cooler.
*
Of course la. That's the main reason why people buy high performance cooler ma.... brows.gif
TSkmarc
post Aug 8 2007, 07:16 AM

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QUOTE(remysix @ Aug 7 2007, 11:30 PM)
naaaahhh...i just buying it coz dunno what to do with the money i have tongue.gif
*
No wonder! Saw in garage sale regarding your E6850 and E6600. Was thinking this guy much be full of $$$!!! Sell me your E6850 cheap cheap la!!!! laugh.gif
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