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Temp Terminology and Measure Clarification Request

Last response: in Overclocking
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March 10, 2007 9:23:56 PM

I've read (and re-read and re-read) the C2D Temp Guide sticky. However I still have some basic questions that are stopping me from getting all I can get out of the post.

First my system: E4300, GA-965P-S3 (F6 bios), AC Freezer Pro 7, Seagate Barricuda 320 GB, Win XP, Front and back 12cm fans, no overclocking yet.

Tools: TAT, Core Temp 0.94, SpeedFan 4.32

First the data, then the questions.

Presume by Ambient temperature you mean room temp (25C).

In the BIOS at boot up:
System Temp = 41C
CPU Temp = 21C

At idle, Speedfan shows the following:
Temp1 41C
Temp2 18C
Temp3 -2C
HD0 35C
Core0 20C
Core1 20C

At idle Core Temp 0.94 shows:
Core#0 20C
Core#1 20C

At idle, TAT shows:
CPU0 37C
CPU1 36C

After 10 min of 100% TAT loading,
Speedfan shows:
Temp1 41C
Temp2 39C
Temp3 -2C
HD0 35C
Core0 43C
Core1 43C

At 100% load Core Temp 0.94 shows:
Core#0 43C
Core#1 43C

At 100% load TAT shows:
CPU0 57C
CPU1 56C

Questions:

Question 1) What is Temp1 on Speedfan? (TCase or TJunction or other)
Question 2) What is Temp2 on Speedfan? (TCase or TJunction or other)
Question 3) What is System Temp in the BIOS? (TCase or TJunction or other)
Question 4) What is CPU Temp in the BIOS? (TCase or TJunction or other)

With respect to Speedfan, I thought maybe Temp1 was TJunction because it was higher than Temp2, but it didn't change on load. So now I'm guessing that Temp2 is TCase, and the core temps are the TJunction temps. Correct?

As far the BIOS goes, I'm guessing that System Temp is TJunction and CPU Temp is TCase? Is that correct?

Both CoreTemp and Speedfan give same readings for the cores. Are they both wrong and need some offset applied?

Bottom line: From the tools I listed above, I don't know what TCase and TJunction are for sure.

Sorry for asking what seems to be asked before, but I am still confused.
a b à CPUs
a b K Overclocking
March 11, 2007 1:52:22 AM

Quote:
Tcase (Speedfan Temp2) Idle = 18 / Load = 39
Tjunction (SpeedFan, hottest core only) Idle = 20 / Load = 43
Tjunction (TAT, hottest core only) Idle = 37 / Load = 57

Ambient = 25
Case = 2 x 12cm fans
C2D = E4300
Chipset = 965
CPU cooler = AC Freezer Pro 7
Frequency = 1.8 Ghz
Load = TAT 100%
Motherboard = GA-965P-S3 (F6 bios)
Vcore = stock


(1) Temp1 on Speedfan = Motherboard.
(2) Temp2 on Speedfan = TCase.
(3) System Temp in BIOS = Motherboard.
(4) CPU Temp in BIOS = TCase.
(5) Core Temps are TJunction.
(6) Speedfan needs offsets applied.

* Disregard Core Temp software and uninstall.
* Ambient 25 is probably inaccurate, and is cooler near computer intake.
* Tcase is offset -5.
* Tjunction is offset by - 15.

Corrected Temps:

Tcase (Speedfan Temp2) Idle = 23 / Load = 44
Tjunction (SpeedFan, hottest core only) Idle = 35 / Load = 58
Tjunction (TAT, hottest core only) Idle = 37 / Load = 57

Hope this helps,

Comp 8)
March 11, 2007 5:35:35 AM

Quote:
Hope this helps,


Wow, sure does.

Thanks a ton.
Related resources
a b à CPUs
a b K Overclocking
March 11, 2007 5:39:21 AM

That's it? No other questions :?:
March 11, 2007 6:14:42 AM

Well, that moves me way farther along than I was. But since you are asking, you said in the guide that TJunction is offset by 15C, but I am wondering how you get the TCase offset to be 5C for this case.

Other than that, between your post and your guide I think I finally got it. Now I can start to overclock.

Thanks again.

As an aside I am trying to figure out why speedfan says my system fan is 675000 RPM, and why the CPU Fan is 0 RPM when it is full blast and 175000 RPM when it is slowed down (for some reason it slows down when I load the Gigabyte ICOOL utility).
a b à CPUs
a b K Overclocking
March 11, 2007 6:39:01 AM

Quote:
you said in the guide that TJunction is offset by 15C, but I am wondering how you get the TCase offset to be 5C for this case.


Quote:
Thermal Flow

Regardless of Load, Tjunction is always ~ 15c higher than Tcase, and Tcase is always higher than Ambient.


Quote:
Parameters

(B) Tjunction is always ~ 15c higher than Tcase.

(C) Tcase is always higher than Ambient.

(D) Tcase Idle should be ~ 2 to 15c higher than Ambient.


Since your ambient is 25c, it's not possible for any part of the computer to be below ambient at 18c. Tcase Idle below ambient is an obvious indication of an offset.

As for your fan RPM's, if you reconfigure SpeedFan's fan multipliers or dividers, you may be able to correct the RPM inaccuracies.

Hope this helps,

Comp 8)
!