Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

I've seen a few similar questions on here but none seem to have a good answer, nor seeing the temperature levels I'm seeing.

Notebook is only a month old and just installed iStat Menus and noticed that the "CPU Die - Digital" sensor temperature is consistently over 80℃.

Currently it is 96℃ with the CPU at 85% idle, all load averages of 2.3.

The lowest I've managed to get it is 49℃ by killing almost everything running. The highest is 103℃, by booting multiple virtual machines. From what I've read, this is 2℃ off the shutdown temperature for the CPUs… and the fans were only running at 3800/4000.

So, is this normal? Have I got a dud MacBook or is iStat Menus to blame? Can't seem to find out how to read the sensors via command line.

47℃

103℃

share|improve this question
4  
Retina 17" ? Not possible. –  Matthieu Riegler Jul 7 '13 at 9:18
    
How do you get a Retina 17" where and how much did it cost? If that CPU temperature would be correct your computer would have shut down to protect it self. –  Buscar웃 Jul 7 '13 at 17:48
    
my mistake, 15". Have amended. –  Jacob Dorman Aug 6 '13 at 1:15

2 Answers 2

Lets understand what is going on here:

Any third party software uses the already available information from your Mac as designed by Apple that uses thermal diodes attached to different points in the system. Apple has done a lots of work to correctly manage the thermal load already. The coding and the mathematics to covert the given information correctly in to the Temperature readings outputs by third party software could be tricky, so use it with grain of slat, since it varies a lot from Hardware (diode) + EFI + CPU types from system to system. In English, the third party software's are not always calibrated for your specific system.

Note from Intel:

Intel® Processors have built-in thermal protection. If the processor gets too hot, the built-in protection shuts down the computer. If your computer is not over-clocked and is running under the design specifications, the built-protection can help prevent damage to your system.

High Temperature readings:

If you use a third party software to measure the temperature or the Extensible Firmware Interface (EFI) readings, contact the software vendor to ensure the software is validated to work with your processor.

If you still want to know more or you see weird Temperature reading, please go to Intel web site and look for your specific CPU specifications. It can not be hotter outside then inside since the CPU is the source of heat, otherwise your computer will just shut down initiated by Intel's CPU internal protection.

However, if that happens (the shutdown by the CPU), then you need to repair your cooling system (fans + heatsinks ect.)

So I just looked up at Intel for my Intel Core i5 (1.8 Ghz) and it shows Maximum temp to be 105 Degree Celsius and it has the build in thermal protection. enter image description here

enter image description here

share|improve this answer

Those temperatures sound fairly normal to me. My 2009-era MacBook Pro typically runs around 80°C and tops 100°C when it's working hard.

my temperatures

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.