CPU Temperatures

[Seann Clark]

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:      +44.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0001
> Core 1:      +32.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0002
> Core 2:      +37.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0003
> Core 3:      +38.0°C  (high = +74.0°C, crit = +100.0°C)
> (plus other stuff like which fans are running, etc.)
>
> Is this expected behavior, that the four cores have different
> temperatures by as much as 10°C?
>
> The above temperatures were measured when I first logged in.
> After doing a bunch of stuff, the temperatures become:
>
> coretemp-isa-0000
> Core 0:      +48.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0001
> Core 1:      +32.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0002
> Core 2:      +37.0°C  (high = +74.0°C, crit = +100.0°C)
> coretemp-isa-0003
> Core 3:      +42.0°C  (high = +74.0°C, crit = +100.0°C)
>
> 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:   +29.0°C  (high = +100.0°C, hyst = +95.0°C)  sensor = Intel PECI
CPU2 Temp:   +35.0°C  (high = +100.0°C, hyst = +95.0°C)  sensor = Intel PECI
temp5:       +27.0°C  (high = +100.0°C, hyst = +95.0°C)  sensor = thermistor
temp6:       +38.0°C  (high = +100.0°C, hyst = +95.0°C)  sensor = thermistor
coretemp-isa-0000
Adapter: ISA adapter
Core 0:      +51.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1:      +34.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0002
Adapter: ISA adapter
Core 2:      +40.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0003
Adapter: ISA adapter
Core 3:      +34.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0004
Adapter: ISA adapter
Core 4:      +37.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0005
Adapter: ISA adapter
Core 5:      +54.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0006
Adapter: ISA adapter
Core 6:      +37.0°C  (high = +82.0°C, crit = +100.0°C)
coretemp-isa-0007
Adapter: ISA adapter
Core 7:      +54.0°C  (high = +82.0°C, crit = +100.0°C)