2002-10-02 11:14:52

by Marc Giger

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Subject: CPU Core voltage


Sorry this mail is not directly kernel related but there are the most intelligent people.

I have some trouble with my dual box. Under high load the box crashes or has segfaults. I found out that the problem is cpu related. Cooling the cpu's with 5 fans lets the box be more or less stable!!

Today I found some interesting data:

sensors (from the lm_sensors package) gives me the following output:

[email protected] /home/hdg # sensors
Adapter: SMBus I801 adapter at e800
Algorithm: Non-I2C SMBus adapter
VCore 1: +1.68 V (min = +4.08 V, max = +4.08 V)
VCore 2: +1.90 V (min = +4.08 V, max = +4.08 V)
+3.3V: +3.34 V (min = +2.97 V, max = +3.63 V)
+5V: +4.94 V (min = +4.50 V, max = +5.48 V)
+12V: +12.16 V (min = +10.79 V, max = +13.11 V)
-12V: -1.63 V (min = -15.06 V, max = -12.32 V)
-5V: -1.26 V (min = -5.48 V, max = -4.50 V)
fan1: 4115 RPM (min = 1500 RPM, div = 4)
fan2: 4440 RPM (min = 1500 RPM, div = 4)
fan3: 4218 RPM (min = 1500 RPM, div = 4)
temp1: +34?C (limit = +60?C)
temp2: +36.7?C (limit = +67?C, hysteresis = +60?C)
temp3: +18.7?C (limit = +60?C, hysteresis = +50?C)
vid: +1.650 V
Sound alarm enabled

Notice the VCore 2 voltage!

The installed cpu's are intel pIII Slot1 @ 600Mhz and have a core voltage of 1.70 V. The VCore 1 value seems to be right!

When I show the values in the system-bios it shows me only one core voltage (I don't know which cpu). And it says also 1.7 V.

And now to my question:

Does anybody know the pins of Vcore and gnd from the Slot1 specs so that I can take a measuring instrument and measure the core voltage?

Unfortunately I can't switch the core voltage in the system bios:-(

Thank you for the help

Marc Giger