Which temps to believe?

Sarduk

Sarduk

Sarduk

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25 Mar 2007
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Coretemp reports temps around 10 degrees higher than SpeedFan does - and ASUS Probe records them as being somewhere in between (not for individual cores though).

COU is a Q6600 (not G0), Thermaltake Ultra 120 lapped w/ fan. Overclocked to 2600MHz

Speedfan:(only does 3 cores?)
Core0 31
Core1 32
Core2 28
CPU 37

Coretemp:
41/40/44/41
 
for me, speedfan, coretemp and everest all give the exact same temps ,which is strange as speedfan is ment to be about 15c below what it really is.
 
What makes that so? Does anyone have any understanding of how any of these things poll the data or is it just taken with salt?
 
It's to do with where each program takes it's temperature reading from. Core temp is roumered to take it from a more 'reliable' location (Don't ask me where each program reads from, as i don't know, but the above is a simplified understanding :))
 
Core Temp lets you monitor Intel "Core Duo" "Core 2 Quad", " series die temperature.

The temperature readings are very accurate as the data is collected from a Digital Thermal Sensor (or DTS) which is located in each individual processing core, near the hottest part. This sensor is digital, which means it doesn't rely on an external circuit located on the motherboard to report temperature, its value is stored in a special register in the processor so any software can access and read it. This eliminates any inaccuracy that can be caused by external motherboard circuits and sensors and then different types of programs trying to read those sensors


TAT (Intel Thermal Analysis Tool) http://shintai.ambition.cz/files/tat.exe and core temp accurately monitors all of the individual core temperatures for Intel processors like the Core 2 Duo and Quad range.

Note* Reported temps will be much higher in TAT or core temp than speedfan or motherboard bios readings. TAT and core temp (temps) are read from thermal diodes (DTS) inside each core and are not comparible to non-core readings.

Hence speed fan is out by +15 due to non direct (DTS) temp reading and is read by MB sensor only
 
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