Because of various impurities and imperfections in the manfuacturing process different CPUs will be able to tolerate different speeds (GHz). Actually all of a given model are the same, run on the same line, manufactured the same way, etc. To understand why you need to understand the manufacturering process for CPUs.

That is proprietary information for them. What Intel will not tell you is at what temperature hte CPU will start thorttling (you don't want it to reach that temp). Before that it will start 'throttling' which means cutting back it's performance in order to avoid just cutting out completely (a crash essentially because the CPU will just shut down to prevdent physical damage). To further complicate things we can find out from Intel that the absolute max temperature before the CPU will just shut itself down is 105C. On the other hand there is a lot of anedotal evidence that Apple really pushes the limits in terms of heat tolerances. The opinion of non-Apple experts familiar with the type of intel CPUs used in these computers is that the CPU should not go above 80C or maybe a little bit more in a laptop. It's almost impossible the internal components would stay that cool under any significant usage. That spec doesn't have anything to do with the temperature of the internal components - that is the ambient temperature of the environment the computer is deisgned to operate in. I may try iStat Menu and see how that works. XCOM - over 70-75 degrees max RPM - with laptop cooler When using a third party app made by CRYSTALIDEA to control the 3000 RPM for both fans XCOM: Enemy Unknown - through steam, it would be 95+ degrees C - I also would get warnings from the computer that my temps were approaching the max limit and to shut down the application Iphoto - importing pics the temp shoots up to 60+ degrees. Using Macbook's automatic sensors for fan control: With little apps running, the system sits around 28-35 degrees C, which is normal operating temps listed by Apple. This data is after I talked to Apple Support and the SMC reset. I was wondering if these are normal temperatures for my Macbook Pro.

Macbook pro late 2013 max out cpu