My motherboard, which has an Intel Pentium II Deschutes 333Mhz
assembled, provides some monitoring data which I'm able to read using
lm-sensors - fans, voltages, and temperatures.

As the first values I got for CPU temperature were lower than the BIOS
ones, I tried setting a formula to compute the value. Unfortunately I
don't remember where did I got it from.

,---- /etc/sensors.conf, CPU temp formula
| chip "lm75-*"
|
| [...]
| # In case a lm75 is used together with a lm78, the lm78 temp sensor will
| # generally show the M/B temperature while the lm75 temp sensor will
| # show
| # the CPU temperature.
| label temp "CPU Temp"
| compute temp @*1.2+13,(@-13)/1.2
`----

(The machine has also a lm78 chip.)

The Intel documentation refers two thermal limits: 65º (max. TPlate) and
75º (max. TCover) [pag. 43,
ftp://download.intel.com/design/pent.../24333503.pdf].

I wonder what's the normal temperature range for this processor, and if
the formula I picked is suitable for this hardware setup, as I'm afraid
the CPU temperature is too high:

,----
| lm75-i2c-0-48
| Adapter: SMBus PIIX4 adapter at 5f00
| CPU Temp: +59.8ºC (high = +74.8ºC, hyst = +65.2ºC)
`----

(This is a 'working, but doing nothing heavy' temperature. (e.g.)
Compiling some not-small application will raise it a bit. And, btw, it's
summer here.)



Just in case there's some interesting information hidden here:

,---- sensors output for lm78
| lm78-isa-0290
| Adapter: ISA adapter
| VCore 1: +2.02 V (min = +1.94 V, max = +2.10 V)
| +3.3V: +3.33 V (min = +3.14 V, max = +3.47 V)
| +5V: +5.05 V (min = +4.76 V, max = +5.24 V)
| +12V: +11.98 V (min = +11.37 V, max = +12.59 V)
| -12V: -11.35 V (min = -12.63 V, max = -11.29 V)
| -5V: -4.84 V (min = -5.25 V, max = -4.74 V)
| CPU fan: 5273 RPM (min = 3013 RPM, div = 8)
| fan2: 2556 RPM (min = 2008 RPM, div = 8)
| MB temp: +36.0°C (high = +75°C, hyst = +65°C)
| vid: +3.40 V
`----

And about the chip (northbridge, I presume):

00:00.0 Host bridge: Intel Corporation 440LX/EX - 82443LX/EX Host bridge
(rev 03)



--
Nuno J. Silva (aka njsg)
LEIC student at Instituto Superior Técnico
Lisbon, Portugal
Homepage: http://njsg.no.sapo.pt/
Gopherspace: gopher://sdf-eu.org/1/users/njsg

-=-=-
"The day Microsoft makes something that doesn't suck is
probably the day they start making vacuum cleaners"
-- Ernst Jan Plugge