0 temp reading after overclocking

[viper_carl]

Hi,
I have a phenom 2 1100T 6 core black edition and when I use the MSI overckock to overclock the system, the core temp shows 0! I tried to restart the program and the same thing happens! If I disable the overclock it works fine! Win 7 64 bit and core temp 64bit! Any fixes for this?

[The Coolest]

Make sure that you disable ACC/Core unlocking options in your motherboards BIOS as this is the most common reason for the temperature sensor to stop giving out readings.

[viper_carl]

I have looked for this setting and I can't see anything in there! Call me a dumby with the new BIOs, I have disabled the turbo core and it's all it will let me adjust!

[The Coolest]

Depending on the motherboard brand, it can be called core unleashing, unlocking etc.

[viper_carl]

The Mo Board is a MSI 990FXA-GD65! I disabled the core unlocking and the cool and quiet and turbo core and it still does it! I spent a while researching this and that's all I can come up with! I don't want to risk burning out my processor and just went back to standard! Wish It would work as it OC's to 3700 and it's a noticeable gain in the OS! I have a corsair H-80 and it runs at 38-40 @ full load (in standard mode)!

[djhreg]

Just want to confirm that I had the same problem and the core unlocker was the problem.

That is, I have been using CoreTemp to debug intermittent sudden shutdowns in a new machine with a ASUS M5A99-V motherboard and a AMD Phenom II X6 1055T (Thuban) processor. After the first try with CoreTemp...it did look like it was getting a little warm when I ran my Nikon film scanner, so I invested in a heavier duty heat sink and CPU fan....which pretty much clamped the temp to under 35C.

But I was still getting the random shutdowns. After reading some more, suspicion headed to the power supply, admittedly an off brand. Yesterday I went and purchased a better power supply. Getting it installed was a major pain because I had to disassemble the entire system to get the old PS out of the case. However, I got everything back installed and tested all the peripherals....no problem. The last test was to start CoreTemp.

Hmmm...no temp. Also suddenly showing only 5 processors and not the right processor type. Ah yes. Have to force BIOS to configure. Powered off, hit del, forced BIOS into setup. Now it recognized the Phenom II properly. On the next boot, BIOS told me "6 cores activated" and when Windows came up, CoreTemp now showed 6 cores and the right CPU type. However, still no temp.

After reading this forum, I rebooted and went into BIOS again. Indeed, I found in the Advanced tab, something called "ASUS Core Unlocker" that was enabled. I disabled it. Rebooted. CoreTemp now shows the temperature properly. After a little more research, it seems that this "ASUS Core Unlocker" is supposed to find "hidden" cores, ie: manufacturer lays out a chip for "n" cores, and simply disables some of them in order to provide some different price points. In my case, this "ASUS Core Unlocker" feature does not seem to do anything useful other than disable the temperature output. I have 6 cores active with it enabled. I have 6 cores active with it disabled.

So....if CoreTemp is suddenly showing "0" two steps:

1) If the "Model" field is not showing the right CPU, you may simply need to reinitialize BIOS...especially if you have recently disconnected all power from the system.
2) If the "Model" is correct, and the right number of cores are showing up and seem to be active, you may need to dig around in your BIOS and find a useless "Core Unlocker" feature to disable.

Hope this helps,

David Hetherington
Austin, Texas