Chosen Solution
Let me tell you my problem, I personally use the late 2011 13 inch mbp and have replaced hdd to ssd, 16 gigs of 1600 mhz ram and applied arctic mx4 freshly. Now I find little improvement in cooling and very good improvement in performance due to the huge upgrade. But however when I use cinebench or other cpu hungry process, the CPU hits 98-100 celsius with fans going beserk. But when it’s idle, the CPU sits at 45-49 celsius. I can understand this could be accessing the SSD through the faulty cable. but even when I go to the Apple hardware test, the fans still scream during memory test. So, is it really the SATA cable end of the day as mentioned elsewhere that is causing this problem? TGPro screen when idle
TG Pro when medium task
TG Pro when memory usage is high after many hours of work on project file
TG Pro at full load and fans screaming
Let’s get a better handle on what’s happening in your system before we address replacing parts. I would recommend you install a good thermal monitoring app like this one TG Pro I haven’t found one that offers a clean presentation of the data and allows you to see a high water mark this one offers. Install it and then paste a snapshot of the main app window (you may need to adjust the window size so all of the sensors are visible) Adding images to an existing question Update! I think you’ve uncovered the issue! I suspect your heatsink has failed! Apple uses a fluid filled heatsink which can leak out and when it does it looses the ability to migrate the heat to the fin area of the heatsink. In your last capture you can see your CPU is getting quite hot (~90ºC) and your fan’s RPM is running hard ()5530 RPM, but the heatsink is not very hot at all! (52ºC) Thats over 40ºC difference. Here’s the needed part MacBook Pro 13" Unibody (Early 2011-Late 2011) Heat Sink and the guide to put it in MacBook Pro 13" Unibody Late 2011 Heat Sink Replacement
