CPU temperature reads 73C

bmahak

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Jun 9, 2014
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Hi,
I have a dual processor xeon L5420 system with ubuntu server running on it.
On idle mode CPU temperature reads between 70C and 74C, Is this normal. if not what can I do about it. I use this heatsinks:

http://www.newegg.com/Product/Product.aspx?Item=N82E16816101288R&cm_re=HEATSINK_SUPERMICRO%7cSNK-P0034AP4_R-_-16-101-288R-_-Product


My sensors command prints this:

coretemp-isa-0000
Adapter: ISA adapter
Core 0: +70.0°C (high = +88.0°C, crit = +100.0°C)
Core 1: +69.0°C (high = +88.0°C, crit = +100.0°C)
Core 2: +70.0°C (high = +88.0°C, crit = +100.0°C)
Core 3: +73.0°C (high = +88.0°C, crit = +100.0°C)

coretemp-isa-0001
Adapter: ISA adapter
Core 0: +72.0°C (high = +88.0°C, crit = +100.0°C)
Core 1: +72.0°C (high = +88.0°C, crit = +100.0°C)
Core 2: +70.0°C (high = +88.0°C, crit = +100.0°C)
Core 3: +70.0°C (high = +88.0°C, crit = +100.0°C)

w83627dhg-isa-0290
Adapter: ISA adapter
Vcore: +1.17 V (min = +0.92 V, max = +1.48 V)
in1: +1.13 V (min = +0.92 V, max = +1.48 V)
AVCC: +3.25 V (min = +2.98 V, max = +3.63 V)
+3.3V: +3.25 V (min = +2.98 V, max = +3.63 V)
in4: +1.82 V (min = +1.62 V, max = +1.98 V)
in5: +1.26 V (min = +1.13 V, max = +1.38 V)
in6: +0.75 V (min = +0.67 V, max = +0.83 V)
3VSB: +3.25 V (min = +2.98 V, max = +3.63 V)
Vbat: +3.25 V (min = +2.70 V, max = +3.63 V)
fan1: 1896 RPM (min = 712 RPM, div = 8)
fan2: 865 RPM (min = 712 RPM, div = 8)
fan3: 2250 RPM (min = 712 RPM, div = 8)
fan4: 878 RPM (min = 712 RPM, div = 8)
fan5: 2008 RPM (min = 712 RPM, div = 8)
temp1: +74.0°C (high = +75.0°C, hyst = +70.0°C) sensor = thermistor
temp2: +71.0°C (high = +93.0°C, hyst = +88.0°C) sensor = CPU diode
temp3: +69.0°C (high = +93.0°C, hyst = +88.0°C) sensor = CPU diode

 
Solution
I can I think help a bit, I punched in your chip to find it's ARK page and see what may be at the root of the problem and Ill link a Tom's page and others that link further on as regards the temp readings your getting... that as you read on it appears it may well be the temp sensors are giving you a false reading at idle... Start with king smp's comments here:

http://www.tomshardware.com/forum/301306-28-degrees-idle-temp-right

He then links to
http://forums.overclockers.co.uk/showthread.php?t=17936945

and in turn he links to here:
http://www.tomshardware.co.uk/intel-dts-specs,news-29460.html

Yeah I know but I suspect it will clear up the concern if in fact it's the sensor reading that is the culprit.

Pibee

Honorable
Sep 21, 2013
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10,860
I can I think help a bit, I punched in your chip to find it's ARK page and see what may be at the root of the problem and Ill link a Tom's page and others that link further on as regards the temp readings your getting... that as you read on it appears it may well be the temp sensors are giving you a false reading at idle... Start with king smp's comments here:

http://www.tomshardware.com/forum/301306-28-degrees-idle-temp-right

He then links to
http://forums.overclockers.co.uk/showthread.php?t=17936945

and in turn he links to here:
http://www.tomshardware.co.uk/intel-dts-specs,news-29460.html

Yeah I know but I suspect it will clear up the concern if in fact it's the sensor reading that is the culprit.
 
Solution

bmahak

Reputable
Jun 9, 2014
5
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4,510


Thanks Pibee,
Is there a way to correct the sensor reading ?
 

Pibee

Honorable
Sep 21, 2013
255
0
10,860
Bmahak

I don't have hands on experience with this issue so I checked with one source I have handy and here's what they say in general reference to the issue but my read of it is no there isn't much that can be done:

Sensor Test
"The recent transition by Intel to 45nm has resulted in some of the DTS sensors showing signs of sticking at low temperatures and not functioning the way users would like them to. If your DTS sensors are sticking then no software in the world is going to be able to tell you accurate core temperatures based on inaccurate data. Different reported temperatures at idle is one possible sign of trouble. "Test Sensors" performs a quick test where it loads up each of your cores and measures the change in the individual DTS data for each core and reports the results.

Temperatures that don't change during this quick test are a sign of a sensor that is getting stuck. One sensor that always changes significantly more than the other sensor is also a sign that the one that moves the smallest amount might be stuck.

This test was able to report that Core0 in my E8400 was getting stuck at a DTS value of 67. It won't go any lower even if I moved to the North Pole. This is outside my normal temperature range so it isn't a problem for me but other users have reported their sensors getting stuck at much higher values. Don't rely on this program or any program to report accurate temperatures on cores that have sensors that are sticking. If this sticking continues to occur at higher values then your load temperatures based on what the DTS is reporting won't be accurate either.

The CPU Cool Down Test takes longer but is much more thorough than this test. It is highly recommended if this initial Sensor Test shows any unusual looking sensor data."

The CPU cool down test is of course a featured test with the RealTemp monitor and here's the link to the documentation from which the above paragraph comes from:
http://www.techpowerup.com/realtemp/docs.php

In the previous links from above, King smp suggested running prime95 to assess temps under load, if they pass then at least you know your not in dangerous temp territory. It might be a good thing to check and it might make it clear that the sensors are in fact the issue and nothing else is astray.