Solution and Trials with Core Temp and Conroe.

[Yoxxy]

People seem to swear by Core Temp saying that this new fangled piece of software will give you 100% accurate results to what your CPU die is, and has killed the need for onboard motherboard sensors from the last 20 years. To this I say in theory this is a good idea but in practicality Core Temp is still a beta program with some room to change.

The reason that people seem to have temperature 10-15 degrees high is that the TCaseMax is set to 85 when I believe it should be 100. On my Core Duo it is 100. What Core temp is doing is taking a delta and subtracting that number from the TCaseMax to give you a temperature from each core. After numerous processor remounts and trying other things to get temperatures down, I have come to this conclusion. When running 2 different mobos with my E6700 I found that it was exactly 15 degrees higher than the internal temperature (infinity 975 and p5w dh) when using excel to map the data. This happened time and time again at given times from hardware monitors and Core Temp.

So today I purchased an e6300, volted it to 1.65 placed a digital thermometer between the IHS and the standard heatsink. Opened it up and let in run. I got into windows for about 3 minutes (processor is fried now good experiment). The digital thermometer read the temperature between 1-2 degrees different then that of the motherboard cpu reading again and again Core Temp was 15 too high. The other thing is on throttle watch, Core Temp read 100 degrees C before it started to throttle. Anyone else can try this experiment as well. The Proc will not throttle till 100 in Core temp. Thanks.

[Brahmzy]

Very interesting....a lot of guys on this forum SWEAR that CoreTemp is the end-all, be-all in accuracy.

[bing]

Great finding ! Thanks !

Just don't forget too much "real" throttling will shortened yer cpu life.

[The Nemesis]

I also noticed that everest ultimate reported core temps the same as the core temp program. Could be it using the same calculations. It'b be nice it what the motherboard reports as the core temp was true. If so these run much cooler than opterons

[Yoxxy]

thats why I bought a 6300. Its toasted and tbh I could give a .

[CPLB]

Interesting find Yoxxy. My E6400 was running at 72C according to Core Temp (stock volts, stock cooler @ 2.66GHz). If you subtract 15C, 57C would be nice...

[G H Z]

There is a big difference between diode temperatures and those measured on the surface of the IHS, so I'm sorry to say your test is flawed.

[lopri]

I trust CoreTemp (and Everest Ultimate) more than anything else. Anyone who has a doubt I suggest try undervolting your CPU. Like this:



I undervolted the E6300 to 1.225V (the lowest my motherboard allows) and got the above temps. Now, if you subtract 15C then you get something like 22~24C? Um.. That's just a degree lower or same as my ambient temp. And I don't believe that a working silicon with electricity supply is running at ambient temp.

Time and time again the CoreTemp became the most trust-worthy temp reading tool for me. (Since I can't directly shoot the thermo-gun @CPU die)

[fornowagain]

I don't know, have you tried the Intel thermal analysis tool? It reads similar to coretemp and everest, it just moves around more, but its much the same. ProbeII reads the same motherboard temps as everest (top one) and speedfan.

[dinos22]

i had an interesting thing with my CPUs/mobos

i basically went from one motherboard DS3 to another DS3 and temps were completely different at roughly same ambient/same everything and many many remounts

i was seeing a good 10-15C higher temps by going from one to another using Coretemp................made me think about it a bit..... can't be right

[AndrewZorn]

There is a big difference between diode temperatures and those measured on the surface of the IHS, so I'm sorry to say your test is flawed.

thats what i was gonna say...

not that core temp isnt wrong, but the test is flawed.

[Yoxxy]

Agreed to a point that a lapped processor is as close as you can get to the die. It wouldn't make sense that all conroes are losing 10-15 degrees based on just the IHS. The other thing is where is TCaseMax coming from. When the similiar architecture of Merom is 100 and Conroe is 85? Also I have tried the Intel Thermal Analysis tool, since it is not made by Intel I guess more then likely it is a copy of Core Temp.

[lawrywild]

Agreed to a point that a lapped processor is as close as you can get to the die. It wouldn't make sense that all conroes are losing 10-15 degrees based on just the IHS. The other thing is where is TCaseMax coming from. When the similiar architecture of Merom is 100 and Conroe is 85? Also I have tried the Intel Thermal Analysis tool, since it is not made by Intel I guess more then likely it is a copy of Core Temp.

well... TAT is older then coreTemp

[AndrewZorn]

Agreed to a point that a lapped processor is as close as you can get to the die. It wouldn't make sense that all conroes are losing 10-15 degrees based on just the IHS.

you mean IHS, the core to IHS thermal material, and the increased temps due to a *HORRIBLE* mount by having the probe between IHS and heatsink...

again, i dont doubt that core temp is wrong, but the idea of a probe on the IHS proving core temp is wrong is crazy.

[Yoxxy]

The mount was horrible on purpose. And Yes I mean as close as you can get between the IHS and Heatsink. That was also the point of driving the processor to 100 degrees before it throttled. This was also the second theory about it not throttling at 85 as if that was the TCaseMax it would. No one has disputed this point.

[fornowagain]

We know the solder on the core melts anywhere from 77C to 85C, you'd think it would throttle before then. Are you saying you measured 100C before throttling with the thermometer or with coretemp?

[Yoxxy]

Core temp. Thermometer measured right around 83.

[fornowagain]

Core temp. Thermometer measured right around 83.

Makes sense. You may be right.

[bing]

Yoxxy, since you said the e6300 is for disposal , mind test this to get the "truth" out ?

The proper way with probe right in the center of IHS , btw Intel did that too for their CPU profiling and testing.

Example pic on D805 smithfield

Courtesy of www.overclockers.com

[aashburns]

If CoreTemp is suppoed to have TCaseMax at 100C instead of 85C, then your temperatures will be 15C HIGHER not LOWER!
e.g. -25C from CPU (value is always negative from the CPU)
100C-25C=75C
85C-25C=60C

I think CoreTemp may need a TCaseMax of 60C.
60C-25C = 35C - much more reasonable

Core Duos are designed for laptops, which run much hotter so CDs and Meroms TCaseMax = 100C.

Remember CoreTemp's accuracy in relation to the TCaseMax (whatever it really is) is purely based upon the accuracy of Intel's Digital Thermometer, which is IMHO more reliable than any other previous means of measuring temperature.

Please read the technical documents on intel's website and then post.

[mascaras]

sory but i cant trust BIOS :



CPU: E6400 @ 3040mhz

Vcore: Default

Bloco : nexxxos xp silver

Temps : Coretemp >> 30c idle // 35 FULL ----SpeedFan & BIOS >> 15c idle //19c FULL







15c ???



regards

[nicepun]

Don't all of these programs read from the from the same sensor??? I use CPUCool for temp reading, but we all know that the true temp reading would be from direct contact with the doide. However, this test is quite informative and it's something to definately something to take into account. Specially sinc he sacrifried an E6300 in the process. Thanks.

[Vric]

mascaras: Speedfan 4.29 don't support 965P chipset yet. What you see there is the motherboard temp and an unknown one.

[mascaras]

mascaras: Speedfan 4.29 don't support 965P chipset yet. What you see there is the motherboard temp and an unknown one.

not an unknown temp its cpu temp , I know what im saying

[Artmic]

God, all this temp talk is making me dizzy, i still don't understand it all. lol

The overall temp should be below 60C ? right?
the 2 cores should be ??? below what? mine go up as high as 66C? when is the frying point? 75C?