[lm-sensors] Curious temperature readings

[r.marek@sh.cvut.cz (Rudolf Marek)]

Hello,

> I'm new to the lm-sensors world, but I have some curious results that 
> I'm struggling to understand.

Lets see.

> My hardware is:
> 	Pentium4 2A GHz (Northwood, 512Kb cache, socket478)
> 	Motherboard is tricky to identify, but says 845CA so maybe it's
> 	 a Jetway 845CA - that seems consistent with their specs and
> 	 looks like an Intel 845 chipset.
> 	Sensor chip is a Winbond w83627hf.
> 
> Software is Mandriva 2006
> 
> I started to get the system shutting down spontaneously, often 
> overnight, but also while I'm working. No obvious application causing 
> it. I did memory tests and that came up clean. So I decided to monitor 
> CPU temperature and voltages using lm-sensors and KDE-SystemGuard.

Good.

> On the original hardware, with a standard Intel heatsink and fan, I got 
> three temperature readings:
> temp1: 15-20?C
> temp2: 28-35?C
> temp3: 54-60?C
> 
> I figured temp3 was CPU chip temperature, and a bit high: the cooler 
> looked a bit grubby and I have a feeling that the thermal grease had 
> been disturbed. So I looked for a way of cleaning this up, and found the 
> Asatek Micro Chill cooler - so I bought one (retail therapy I guess...)
> 
> Anyway, with this (big) cooler now on the chip, my readings are:
> temp1: ~20?C
> temp2: 30-35?C
> temp3: Started at 118?C (!) but is gradually working its way down 
> towards 60?C
> 
> Now I'll admit that I might have screwed the cooler installation, but I 
> was surprised to see 100+?C on a running machine. So have I 
> misinterpreted the readings, or maybe the sensors are not connected like 
> lm-sensors expects...
> 
> Anyone have any suggestions?

Yes, what is the output of sensors command?
You may want to fiddle with thermistor/diode settings, also check the BIOS temps
please how they are diffrent?

> One other thing, VCore1 is a bit fluffy, with occasional spikes to 1.8V 
> and dips below 1.4V (should be 1.5V). Does that sound reasonable?

Hmm this should be stable maybe it is not a thermal problem at all? Tried with
another PSU?

Regards
Rudolf