Chosen Solution
In my 2011 27” the secondary heat sink to the power supply is running 20˚C hotter than the primary and the proximity sensor, and even with specific and detailed control of the air flow with TG Pro is very hard to cool. WHY this specific heatsink’s higher temperature? And where is it placed on the board? I have not been able to locate its position. Since it’s to do with transporting heat away from the power supply, I assume it has nothing to do with thermal paste? UPDATE Requested image of heat sensor output from TG Pro
The heat sink in question is the power supply heat sink.
Ah! I get it, the power supply heat sinks! To be honest I haven’t made an effort to monitor it. I’m more concerned with the logic board sensors. Sadly, Apple doesn’t offer any details within the power supply so we can’t identify which heat sink the sensor refers to.
There is no fan’s on the power supply its dependent on the chimney effect of the systems design. My own 27” also shows a high temp as well.
