Windows 7: P8Z68 Deluxe CPU temps and BIOS version

Has anyone noticed with this ASUS Motherboard that the CPU temperature measures are different after upgrading from the 0501 BIOS (all ASUS releases for the Board). The temps went down about 10 Celsius. One explanation I saw said it was Tcase vs Tcore/Tjunction difference.
http://forums.anandtech.com/showthread.php?t=2188546
But
1) Why suddenly change
2) It now doesn't align with Core Temp, Real Temp, SIW...
3) More importantly the FAN Xpert control curves in the ASUS AI suite are still the same. This means the CPU isn't getting cooled enough???

I'm now back with the 0501 BIOS but definitely confused.



Has anyone any experience with this issue?

mjf, I don't have an Asus board, but from reading reviews of Asus boards on Newegg I have read where several people said the same thing.

Thanks for the response essenbe.
It seems a pretty big deal (especially to me!) and yet getting information is proving difficult.
When it comes to providing wide ranging high level advice - Seven Forum you're in a league of your own.

Have you tried the ASUS forums?

ASUSTeK Computer Inc.-Forum-

Yes one of the first areas I went to.
One of the reasons I praised this website in comparison.

I didn't find an answer to the important issues I raised above.
I tried BIOS upgrade versions 0603 and 0706 which both had the temperature issue. Needless to say I don't like flashing the BIOS too often and went back to 0501.

It looks like ASUS have an issue Measuring Tcase in later BIOS versions and using Tcore/Tjunction temperature control curves which is what I observe!
Official ASUS BIOS and Program Updates - Page 182 - [H]ard|Forum
[H]ard|Forum - View Single Post - Official ASUS BIOS and Program Updates
This may apply to other ASUS Z68 boards.

I might try SpeedFan - any other suggestions?

Edit: Until ASUS fix the problem I'd stay with the 0501 BIOS or you will not get correct CPU fan control.

I don't have any suggestions for you. Like me, I know you want to know what the temp actually is. I did some research on it today and info was pretty hard to come by, as you said in your first post. I think I would just use whatever program I have the most confidence in, and go with that. That's my opinion. Sorry I couldn't help.

The later Bios from 6.03 has the correct temprture value the 5.01 is incorrect this I think is due to possible changes in the Z chipset.
I have several Z68 chipset systemboards including an intel model, I get aprox the same reading on all my i7 2600k cpu's with the same V8 Cooler on all my boards +- 2 degrees, using the standard Intel box cooler the temp is a lot more but still matches the Intel system board with standard cooler.
I did these test because I was worried why my Asus system board with a I7 and a V8 cooler was hotter on idle than the Intel board with a standard cooler.
Hope this helps you.

Thanks for your response but...

v 0501 bios measures Tcore very close to the software (CoreTemp, RealTemp, SIW). The ASUS temperature control curves appear well matched to this temperature.

Later BIOS versions measure 8-10 Celsius less according to the ASUS BIOS and Probe II. I assume what is being measured is more like Tcase. The temperature control curves have the same %Fan vs Temperature.
The net result is Prime95 and Handbrake encodes run around 3 degrees Celsius higher with the later BIOSs. I consider this bad!

ASUS can't change the temperature measure and leave the control curves the same.

There is another way to read temps Speccy - System Information - Free Download to see how Speccy's readings fit in with your others.