[as99127f] - a note about measuring CPU temperature on Asus CUV4X

Mark D. Studebaker mds at paradyne.com
Wed Feb 19 02:54:43 CET 2003

I don't see how there could be duplicate temp2 entries.
If you do upgrade to 2.7.0 be sure and remove old libsensors libraries.

Artur Gawryszczak wrote:
> There is a question in sensors.conf.eg
> # does anyone know a board for which the following is correct?
> #   compute temp2 (@*30/43)+25, (@-25)*43/30
> ... and my answer is: Yes, I know :-) It's Asus CUV4X
> Quite recently I did some experiments with this board, and overclocked 
> iCII600@(900÷950), V_core=(1.8÷2.0)V. I'm not extremely hard 
> overclocker, but I like to know what's going on, and what are the 
> limits for my machine to be rock-stable.
> First, I connected a probe, and make sure it's showing right 
> temperatures. In my hand it showed +35°C, and in water-snow mixture it 
> was about +2°C. Conversion formula "temp3 @*2.0" works good. 
> Then I've put the probe between heatsink and the processor, as near the 
> silicon core, as possible. I've stressed the CPU for some hours using 
> mprime and burnP6, and collected measurements from the probe, and from 
> thermal diode. Here you can find the graph showing, that formula 
> "(@*30/43)+25" works much better: 
> http://www.camk.edu.pl/~gawrysz/as99127f-i2c-0-2d.png (~10kB)
> Readouts from CPU diode seems to be very noisy, but in BIOS they behave 
> similarly.
> I'm using lm_sensors 2.6.5. I've tried 2.7.0, but something was wrong, 
> and they didn't work. Probably because there were duplicate temp2 
> entries in /proc/....../as99127f-i2c-0-2d directory. I didn't have time 
> to find out if I did something wrong, or there is a bug in as99127f 
> module.

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