Negative temp reading on speedfan

[mighty_moll]

Overclocked my Q6600 go stepping today and noticed that every now and then speedfan is giving negative temperature readings for the CPU and system. The lastest gives CPU -30 and system -40 (fluctuates a bit).

I tried rebooting and it still gave these readings - so i left the pc off for half an hour and now its back to normal. The CPU sits at 37 to 38 C idle and 50 c at 100% load running the 64 bit prime 95 app. The system temp rarely moves 1 degree either side of 35 C.

Is it normal to get these negative readings once in a while (especially after 100% load for a few hours) or do i have a problem that needs addressing?

Thanks for any help!

 

[alexhull24]

It may be a bug in speedfan itself, have you tried a different version? I know that some of the newer 45nm CPUs suffer from dodgy temp sensors, though I've never heard of it in a q6600. If it's still testing OK and working fine i'd be inclined to just leave it.

 

[mighty_moll]

The BIOS temp readings are normal and other software has never shown this. After reading other topics and those on a few other sites it seems that if the problem persists i should try remounting my cooler. I shall take your advice and see how it goes - if the problem persists i'll try a cooler remount - thanks for a speedy response!

 

[monkey7]

No cooler remount needed for this, you can't just jump from load temp (60*C?) to -40*C, so it has to be a software bug / glitch.

 

[mighty_moll]

Ok - hasn't happened for a while now with testing so everything looks good and stable - thankyou.

 

[Ghaz]

Speedfan is buggy. It once told me that one of my temps was like 27,000C or something like that.