Core 2 Duo Temperature Readings

[jgigz]

Odd for me since alot of you are getting higher temp readings with Coretemp but i get lower readings with core temp. Bios reads around 45-50c idle and 55-60 load (as well as the asus pc probe). Coretemp reports around 37-43 idle and 45-50 load. Speed fan gives me simmilar readings to coretemp.

 

[Pabster]

Just remember that aiming a laser thermometer at the base of the heatsink IS NOT an accurate measure of CPU core temperature.

Remember the cores are blow an integrated heat spreader. That's a ways below the base of the heatsink and things are definitely hotter down there.

 

[EXEEMLITE]

10-4
but how much hotter, give or take a few degrees

 

[Pabster]

Originally posted by: EXEEMLITE
10-4
but how much hotter, give or take a few degrees

Give MANY degrees.

A thermistor mounted in your heatsink would be more accurate, but still not accurate enough.

 

[PingSpike]

Its been my experience that motherboard temp sensors are wildly inaccurate. My chaintech vnf3-250 reads ~41 idle and ~50 load no matter how high of an overclock. Its like it doesn't even do a reading, it just checks a cheat sheet for the answer and hands it to me.

 

[myocardia]

I personally just think that CoreTemp doesn't work at all. On my 130nm 2.4 Ghz Skt. 754, it reads 6-8°C below what my motherboard's thermistor reads. That's not even possible. Your core temp can't be below what an external thermistor reads. And this isn't some brand new chip, it's been around since before this guy wrote the app. Too bad, though, we actually need an app that can read the core temps; CoreTemp just isn't it.

 

[lutorm]

I have a DS-1820 temperature probe (very accurate) glued to the base of my Scythe Ninja heatsink with thermal expoxy, and at full load it shows 35C when Speedfan or ATI Tray Tools or the "SmartGuardian" that came with the MB all show 55. This is at *stock* clock on an E6400.

I can't really cool the heatsink base more than that, so I'm wondering if this is a poorly seated heat sink? Or are the readings wrong? I mean, *something* is wrong if a stock clocked mid-end CPU almost reaches the limit temp when the heat sink base is close to case temp...

Parenthetically, it's not clear what to think about the temperature limits. The datasheet specifies a maximum *case* temperature at the center of the IHS. As was pointed out earlier, this is not the location of the on-die thermal monitor which is right at the point of maximum power dissipation. This means that the case temp is probably far *lower* than what's indicated by the CPU thermal monitor, but *higher* than the heatsink base. Without knowing the thermal resistances between die-case and case-heatsink, it's impossible to know where in that range T_case ends up...

 

[EXEEMLITE]

Well guys, out of frustration I rma'd my board adn got an identical board with identical readings, now here is the kicker. I also sent back my ninja scyth, and got a zalman 9500. (I have not built 3 machines with these.) Needless to so I am frustrated right now Im sitting on 41 c, the same as the stock which was 10 c less than the ninja's 51c. I did cold boot at 37, and i was happy for minute but it has settled on 41 again with core. 44 with everest ultimate and 48 with sensor view, so I am now at my wits end. Lutorm, what board do you have. its always nice to know what kind of hardware you have. Maybe put it in your sig for future.

 

[Ryan T]

I also have a Core 2 Duo E6400 w/ the P5B Deluxe motherboard. At stock speeds, I idle at 35C according to the ASUS monitor. This is with the Thermaltake Big Typhoon heatsink.

That should give you a reference from someone with a similar setup.

Now, can someone tell me if 35C on idle and ~43-45 with one Prime95 running is acceptable? Or is it even accurate as I've heard of bad reports from this particular board.

Will the new BIOS just released aid in this in any way, or is my Big Typhoon maybe improperly mounted?

This is all with an X1800XT GPU for what it's worth.

 

[smopoim86]

Originally posted by: thilan29
Alright even with WATERCOOLING on my E6400, my load temps. at 1.4v and 1.35GHz hit 60 degrees, and idle is down about 5 degrees from my Thermaltake BigTyphoon. Watercooling shouldn't have such a large delta in temperatures should it??

The temps. reported by Coretemp hover around 56-57 degrees at load and drop to about 50 degrees at idle.

Damn, I don't know which program to trust for the temperatures. I hope the temperatures are just being read wrong.

What kind of water cooling are you using. Those temps sound awful for watercooling
Hopefully the radings are inaccurate

 

[Madellga]

Originally posted by: phile
You're running way too hot.

http://processorfinder.intel.com/details.aspx?sSpec=SL9S9

The C2D chips have a Thermal Specification of 61C - any higher and the system may become unstable.

-phil

Is that for the Core temp (on die) or environment temperature (inside housing)?

 

[Pantoot]

Originally posted by: Madellga
Is that for the Core temp (on die) or environment temperature (inside housing)?

Thermal Specification: (Also referred to as Thermal Temp) The Thermal Specification is the temperature at the critical point on the die and usually represents the hottest point on the processor. Therefore, the Thermal Specification represents the maximum temperature for reliable operation of the processor.

 

[Madellga]

Originally posted by: Pantoot

Originally posted by: Madellga
Is that for the Core temp (on die) or environment temperature (inside housing)?

Thermal Specification: (Also referred to as Thermal Temp) The Thermal Specification is the temperature at the critical point on the die and usually represents the hottest point on the processor. Therefore, the Thermal Specification represents the maximum temperature for reliable operation of the processor.

Thanks! I saw now that the term is explained in their glossary

This is probably the reason why O/C above 3.2GHz gets more difficult. Both my systems have the Die temp around 60C under load (Orthos). If I bump up just a bit, they get instable even with higher VCore => meaning need for a better cooling.

As I'm not willing to spend money on this, I have to get used to this limit.

Anyhow, 50% o/c should make most people happy.

 

[Destinova]

I'm also having issues, running a stock HSF and no OC on an E6400 on an Asus P5B. 45 at idle, 60-62 running prime95.

 

[Geekwannab]

These are my readings. Running E6600 on P5WDH, my signature says the rest

Idle:
Asus probe - 35C
speedfan-35C
Everest - 34C
Coretemp-50C

Load(after 2 hours of ORTHOS):
Asus Probe - 50-51C
Speedfan-50-51C
Everest-50-51C
Coretemp -64-65C

I am also a bit confused/frustrated by all these different readings. It will be nice if the "Intel Hardware Monitor" runs on non intel boards. Atleast we can trust that software since its from intel and hope that they follow their own way of measuring the temps

 

[myocardia]

Geek, your cores have to be hotter than the sensor mounted underneath your processor. For example, don't you think that your coolant in your radiator is hotter than a thermometer mounted near your radiator would be?

 

[niji1875]

51C is very normal i think

 

[DJ Mike]

64-65C is marginally less than what I was getting before I reseated my Ninja heatsink last night.

Now, with my system overclocked to 300FSB (2.7Ghz) - E6600 CPU and P5W DH mobo - I'm showing 55-58C at full load having run Orthos over an hour.

I'm afraid I can't speculate about Intel's stock cooler vs. Ninja, but it is genuinely possible to get low temps from Conroe, you just have to persevere and be prepared to reseat your HSF to get it right

 

[Geekwannab]

Originally posted by: myocardia
Geek, your cores have to be hotter than the sensor mounted underneath your processor. For example, don't you think that your coolant in your radiator is hotter than a thermometer mounted near your radiator would be?

LoL, I agree with you totally on that, that my the temps reported by coretemp which is actually measuring the temps form the diode inside the core would be a lot hotter than the one that actually measures it from the mobo. But my question is, Intel's 61.5C limit applies to which temp. The one measured by coretemp which comes from the core themselves or the ones that's comming from the mobo sensor. If it's the former, then I am not gonna take my chip anything over 62C in coretemp for my OC as I always build a PC once every 4 years and I want this kickass system to last atleast four years or maybe more

 

[Destinova]

Exchanged my E6400 today, and now getting 28C idle, 42C with full load. Definitely some of these chips are running hotter than others.

I had no problems exchanging mine since it was running close to 70 and was only rated for 61.

 

[hags2k]

So, from what I've read (http://www.silentpcreview.com/article191-page1.html a good article for example) the readings your motherboard gives can be pretty inaccurate.

Mine are

Idle: 43C
Load: 63C
System/Motherboard: 43C

E6600 stock speeds, stock voltage, stock HSF, 120mm case fan, 21C ambient (according to the thermometer in my room).

I know something is up, because even at full load I can touch the heatsink and it's barely warm to the touch. I also know it's seated well and I'm using Artic Silver 5 thermal compound. I reseated the fan several times, and one time I did NOT get it reseated well and my temps spiked about 15 degrees higher idle. Also, when I ramp up the cpu usage while touching the heatsink, I can feel it getting warmer, but at idle it's practically cold to the touch, and simply gets warm under load, not hot by any means.

The northbridge chipset heatsink next to the processor, in contrast, is VERY hot to the touch. I'm not sure if that's the other temp my bios (and speedfan, which always matches the bios) is giving me, but I'm just guessing.

Also, my system, even with a bit of overcocking (from 2.4 to 2.53 Ghz) continues to be rock-solid stable, using prime95, cpustress test, folding@home, and also when running seti@home and einstein@home simultaneously (which actually gets my cpu hotter than any of the other programs I've used)

So, what do you guys think? Inaccuracies, or perhaps some conroes just like to run hotter than others?

 

[WileyCoyote]

I'm seeing the same discrepancy in my temp readings on the E6600 with the P5W DH @ 300mhz FSB and twin 120mm (70 CFM) fans in an Ultra Aluminus case. At this very moment, I'm seeing 40 (Core Temp) vs 30 (Speedfan) at idle.

Here's how Intel defines Thermal Specification:

Thermal Specification: (Also referred to as Thermal Temp) The Thermal Specification is the temperature at the critical point on the die and usually represents the hottest point on the processor. Therefore, the Thermal Specification represents the maximum temperature for reliable operation of the processor.

Although I'm also suspicious of Core Temp since it does list the "TCaseMax" as 85 (see the post near the beginning of this thread), there must be a significant variation, assuming the diode is mounted at the "critical point on the die." The $64k question is whether CoreTemp is getting an accurate read -- is there a chance that it's wrong?

 

[eelw]

I trust Core Temp. Since the thermal diode is directly on die, of course it will read higher than the mobo probe below the CPU socket. As for TCaseMax, yeah it reaches a max of 85C before it throttles back.

 

[fx9]

LOL.....My MOBO is giving me higher reading than CoreTemp & Intel thermal analysis tool.
I'm non-overclockers, with my E6600 running at stock speed. Still using original HSF & thermal paste.

My readings for my CPU temp. are:
MOBO Probe: idle 45C, load 59C
Coretemp: idle 42C, load 58C


Can anybody tells me whether this range of temperature is normal for a C2D running at stock speed?
Thx.


________________________
E6600 2.4Ghz (266MhzX9)
Asus P5B "regular" aka vanilla

 

[execine]

i get up to 60 at 3.4 ghz with 1.412v on load... idle 45-47...