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Old 08-21-2008, 04:40 PM
"Rich Emberson"
 
Default CPU Temperatures

I've got a ASUS P5Q Deluxe running a Intel quad core QX9550.
When I display the current temperature readings I get:

> sensors
coretemp-isa-0000
Core 0:***** +44.0C* (high = +74.0C, crit = +100.0C)

coretemp-isa-0001
Core 1:***** +32.0C* (high = +74.0C, crit = +100.0C)
coretemp-isa-0002
Core 2:***** +37.0C* (high = +74.0C, crit = +100.0C)
coretemp-isa-0003
Core 3:***** +38.0C* (high = +74.0C, crit = +100.0C)

(plus other stuff like which fans are running, etc.)

Is this expected behavior, that the four cores have different
temperatures by as much as 10C?

The above temperatures were measured when I first logged in.

After doing a bunch of stuff, the temperatures become:

coretemp-isa-0000
Core 0:***** +48.0C* (high = +74.0C, crit = +100.0C)
coretemp-isa-0001
Core 1:***** +32.0C* (high = +74.0C, crit = +100.0C)

coretemp-isa-0002
Core 2:***** +37.0C* (high = +74.0C, crit = +100.0C)
coretemp-isa-0003
Core 3:***** +42.0C* (high = +74.0C, crit = +100.0C)

Again, different temperatures. Are the temperatures on

the 4 core CPU chip really that different?

Thanks, Richard


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Old 08-21-2008, 04:53 PM
Seann Clark
 
Default CPU Temperatures

Rich Emberson wrote:

I've got a ASUS P5Q Deluxe running a Intel quad core QX9550.
When I display the current temperature readings I get:

> sensors
coretemp-isa-0000
Core 0: +44.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0001
Core 1: +32.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0002
Core 2: +37.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0003
Core 3: +38.0C (high = +74.0C, crit = +100.0C)
(plus other stuff like which fans are running, etc.)

Is this expected behavior, that the four cores have different
temperatures by as much as 10C?

The above temperatures were measured when I first logged in.
After doing a bunch of stuff, the temperatures become:

coretemp-isa-0000
Core 0: +48.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0001
Core 1: +32.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0002
Core 2: +37.0C (high = +74.0C, crit = +100.0C)
coretemp-isa-0003
Core 3: +42.0C (high = +74.0C, crit = +100.0C)

Again, different temperatures. Are the temperatures on
the 4 core CPU chip really that different?

Thanks, Richard

This is normal for a multicore system. I have a dual quad core system
and it shows total and per die temps that are between 2-15 degrees
difference in temp based on CPU usage. on my system it is usual for
cores 1, 5 and 7 to get more use than the other 5 cores See below:


CPU1 Temp: +29.0C (high = +100.0C, hyst = +95.0C) sensor = Intel PECI
CPU2 Temp: +35.0C (high = +100.0C, hyst = +95.0C) sensor = Intel PECI
temp5: +27.0C (high = +100.0C, hyst = +95.0C) sensor = thermistor
temp6: +38.0C (high = +100.0C, hyst = +95.0C) sensor = thermistor
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +51.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +34.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0002
Adapter: ISA adapter
Core 2: +40.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0003
Adapter: ISA adapter
Core 3: +34.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0004
Adapter: ISA adapter
Core 4: +37.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0005
Adapter: ISA adapter
Core 5: +54.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0006
Adapter: ISA adapter
Core 6: +37.0C (high = +82.0C, crit = +100.0C)
coretemp-isa-0007
Adapter: ISA adapter
Core 7: +54.0C (high = +82.0C, crit = +100.0C)

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