Temperature readings too low?

Daverino

Platinum Member
Mar 15, 2007
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Forgive me for crossposting in both the CPU forum and the cooling forum but I'm not really sure which category this should be under.

I just upgraded to a Intel E6750 and an Asus P5K Deluxe motherboard. I removed the old motherboard setup and took my Thermalright SI-120 off. I reinstalled that on the new chip and replaced the motherboard. I'm using a Nexus 120 silent fan on the SI-120. After some fights to get it to recognize my SATA drives I was able to boot.

With my old P4 overclocked to 3.96 on this setup I would idle at around 40-45 degrees. My mobo temperature was usually around 30 degrees. When I booted up the new E6750, my Asus probe showed me running at (I kid you not) 8 degrees. The motherboard was running at 24 degrees which is about room temperature. Now I'm not about to believe that my thermal paste applying skills are so great that I can get my temperatures down this low.

I thought perhaps it was the Asus probe, so I updated that, but no, the temperature remains sub 10C. Perhaps the motherboard had an issue, so I flashed the BIOS to the most recent version. Nope, nothing. I downloaded TAT. Samer readings. I downloaded Speedfan. Same readings. I crank up Orthos on both cores and I'm able to get the temperature to go up to 21C on the Asus probe and 28C on TAT. . .

I don't know what to make of all this. The probes, if I'm not mistaken, are in the CPU itself. I just can't trust that these temps are right. And if I want to overclock my system, I can't do that unless I know what my real temperatures are.

Has anyone ever seen or heard of anything like this?
 

Daverino

Platinum Member
Mar 15, 2007
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I just tried coretemp and these temperatures are coming out fine. I did flash my BIOS to the most recent version, but that didn't change anything.

It looks like it's a mobo problem as I think the ADC from the mobo is responsible for the temp that is whacky. Maybe the flash didn't go through?
 

TC91

Golden Member
Jul 9, 2007
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i dont think the flash didnt go thru properly, otherwise ur motherboard probly wouldnt boot in that case. it is probly the sensor on the cpu or motherboard that is uncalibrated.