On Intel chip, which sensor to use
narugit opened this issue · comments
- CPU die temperature
or
- CPU proximity temperature
I should use "CPU die temperature".
From Intel document, I should monitor "CPU die temperature" not to exceed Tjunction max.
cf.) https://www.intel.com/content/www/us/en/support/articles/000005597/processors.html
「What is Tjunction max temperature?」
Tjunction max is the maximum thermal junction temperature that a processor will allow prior to using internal thermal control mechanisms to reduce power and limit temperature. Activation of the processor's thermal control system may cause performance loss as the processor typically reduces frequency and power to prevent overheating. The goal for a system builder or a do-it-yourself (DIY) end user is to design a platform configuration that keeps the processor under the Tjunction max threshold during heavy workloads to maximize performance of the system.
The benefit to a user is that many third-party utilities can monitor the digital thermal sensor (DTS) on the processor die to see how close the system is approaching the Tjunction max temperature without any destructive testing. We recommend that end users look up information on the product specification page (ark.intel.com) to aid them in system assembly. Original design manufacturers should consult the nondisclosure agreement (NDA) documentation available to them for full details.
The sensor of "CPU proximity temperature" is located near the CPU itself such as CPU IHS or heatsink.
Actually, I could not find the place but it does not sensors "CPU die temperature", so it is cooler than CPU die.
cf.) https://discussions.apple.com/thread/6666066