CoreTemp or RealTemp?

[error8]

Ok, since I've switched from AMD to Intel, the only disadvantage I've found is temperature reading. With AMD I use to have about the same temperature, no matter the software used to read it.
But with Intel, this is a pain in the ass. Every program I use shows me different temperatures. I've read many threads about how things work with temperatures on Intel platform, but I've managed to get myself even more confused.
It seems to me that most people use either CoreTemp or RealTemp, but there is some 10 degrees difference between them. So which is the true "thermometer" for my cpu?

 

[Duvie]

Coretemp or TAT...will give you true core readings....not calibrated temps on the top of the die under the IHS like most other apps....

Coretemp and tAT (if updated for support for your chip) should read identical

 

[akhilles]

That's probably because Intel doesn't give away the formula for calculating the correct cpu temps to 3rd-party programmers, or so I read ages ago.

I use RealTemp for overclocking & CoreTemp for every day. The new CT is more accurate than the old ones.

 

[error8]

Yeah, for overclocking RealTemp is "better" since it gives me 10 C less then coretemp. So at 55 C I should be going further, but at 65 C as CoreTemp reports, I'm exactly at the edge.

 

[Tempered81]

Both programs report the same Distance to TJmax. Coretemp might say you're at 55C load with 50C to go, while Realtemp will tell you it's 45C load with 50C to go. Either way, you still have 50C to go before your cpu automatically throttles to prevent damage, and AFAIK nobody knows which program's temp reading is correct.
Duh!

 

[Duvie]

I have never messed with realtemp....

Wouldn't TAT be accurate? Since on my chip TAT and coretemp agree perfectly I think I will put stock in that...Must be something to it when 2 apps agree...

I guess I can feel all warm and fuzzy with realtemp's lower readings but if I want 10c lower readings to feel good I will use gigabytes monitor temp...

 

[Tempered81]

duvie, is tat working with 45nm chips now? when the e8400's came out, it would tell me "unsupported cpu" and force quit.

 

[Drsignguy]

Originally posted by: jaredpace
Both programs report the same Distance to TJmax. Coretemp might say you're at 55C load with 50C to go, while Realtemp will tell you it's 45C load with 50C to go. Either way, you still have 50C to go before your cpu automatically throttles to prevent damage, and AFAIK nobody knows which program's temp reading is correct.
Duh!

This is a correct statement. If you feel better with reading the lower temps, use Realtemp. But as far as readings to tjmax, both are the same. Realtemp reports 95c and coretemp reports 105c.

 

[error8]

Originally posted by: jaredpace
duvie, is tat working with 45nm chips now? when the e8400's came out, it would tell me "unsupported cpu" and force quit.

Tat doesn't work with my E7200. "Unsupported cpu" as you say.

 

[error8]

Ok, so the bottom line is that I can use any of them since it's the same thing after all. Thanks for your advices, I'm going to give it a try for a 4ghz since I still have some 50 C to play with until danger.

 

[Tempered81]

watch your volts though!


http://forum.lowyat.net/topic/666785/+0#entry16560973

"--------------- 7) Summary -------------------

1) Heat is the number 1 enemy for your CPU. The cooler your CPU runs, the better it is

2) Software monitoring of the actual CPU temperature is not entirely correct.
--- This applies to ANY software available including popular softwares e.g. core temp, speedfan, etc

3) Delta to TjunctionMax (Distance to maximum core temperature)
--- Is the most accurate indication of your CPU's relative temperature
--- It is accurate as it obtains the readings directly from the DTS
--- It is NOT an absolute temperature reading (rather, it indicates how far away the temperature is, from maximum core temperature

4) TjunctionMax
--- Nobody knows the actual value of TjunctionMax (as Intel does not release the value)
--- Intel only releases the "Thermal specification" to indicate TcaseMax (not easy to measure)

5) There is no such thing as a safe temperature for your CPU
--- As it depends on various factors (as stated above)
--- Again, the cooler it is, the better.
--- In general, most enthusiast will recommend not exceeding 60-65'c

6) If you really really REALLY want the most accurate temperature reading, then follow the guide on how to place a temperature sensor on top of your CPU
--- To measure Tcase
--- Intel has a guide to this but it is not easy (involves making a groove in your IHS)"


http://forum.lowyat.net/topic/666785/+0#entry16560973

 

[Duvie]

In both my Q6600 and Q6700 systems real temp is off by 15+c which is still same distance...

Coretemp's tjunction is 100c and real temp has it at 85c...so 15

Jared...sorry I dont have 45nm chip yet...

 

[error8]

No more then 1,4V.

 

[geokilla]

No one suggested this bout how about measuring the temperature in the following way:

After you've got your desired CPU speed and Vcore, Use CoreTemp or w/e Temp and choose the amount of degrees left to TJunction.
Then stress test your CPU to get see how much degrees is left till you reach the TJunction. (Maybe 15 to 20C? That I don't know)
Run the motherboard CPU sensor to get a rough estimate of your CPU temp.

It may not be the best way and it could be a bit troublesome, but that's what I would do with my future Intel CPU upgrade.

 

[Tempered81]

Originally posted by: error8
Ok, so the bottom line is that I can use any of them since it's the same thing after all. Thanks for your advices, I'm going to give it a try for a 4ghz since I still have some 50 C to play with until danger.

if you goto thermal junction maximum:

coretemp of 105C or realtemp of 95C for your e7200

then you are REALLY pushing the limit. That is like redlining a car, or even worse i would suppose.

you probably wouldn't want to fold 24/7 above 73C if you are concerned about the longevity of the cpu. Many recommend staying closer to < 65C, and the cooler the better

 

[error8]

Originally posted by: jaredpace

Originally posted by: error8
Ok, so the bottom line is that I can use any of them since it's the same thing after all. Thanks for your advices, I'm going to give it a try for a 4ghz since I still have some 50 C to play with until danger.

if you goto thermal junction maximum:

coretemp of 105C or realtemp of 95C for your e7200

then you are REALLY pushing the limit. That is like redlining a car, or even worse i would suppose.

you probably wouldn't want to fold 24/7 above 73C if you are concerned about the longevity of the cpu. Many recommend staying closer to < 65C, and the cooler the better

Of course. To reach T-junction I should put over 1,6 V in my chip and that is insane. I'm having 50 C until T-junction at 3,8 ghz with 1,35 V ( in bios ) 1,32 V after v drop. So, I'll see what 1,4 V can give me.

 

[Tempered81]

Yah sounds right to me...

Correct me if i am wrong - IMO, safe barriers for a penryn dualcores are Delta to TJmax of > 30C combined with a Vcore < 1.40v actual.

edit: this is the equivalent of 65C in Realtemp and 1.400 Core Voltage in Cpu-Z. Beyond this = danger zone? :laugh:

 

[error8]

Originally posted by: jaredpace
Yah sounds right to me...

IMO, safe barriers for a penryn dualcores are Delta to TJmax of > 30C combined with a Vcore < 1.40v actual.

Thanks.