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crystalidea / macs-fan-control

Control fans on Apple computers
https://crystalidea.com/macs-fan-control
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MacBookPro18,3[8/14]: Performance core temperatures for core 4 might be incorrect. #685

Open nstuardod opened 1 year ago

nstuardod commented 1 year ago

I have a base model MacBook Pro 2021 with 8 CPU cores. When running high CPU loads on the machine, the sensor list displays suspiciously low temperatures for the 4th performance core. I suspect core 4 is the core Apple disabled during the binning process.

AFAIK the M1 Pro consists of two performance clusters: first cluster contains cores 1-4 while the second one contains cores 5-8. Previous versions of Macs Fan Control used to display data for all cores, including the disabled ones so it was possible to find out which ones were the disabled ones as they were noticeably cooler than the rest of cores. In my machine those were cores 4 and 8, coincidently the last cores of each performance cluster.

screen

nstuardod commented 11 months ago

MacBookPro18,3_tech_info.zip

Tech info was collected during high CPU load. Cores 4 and 8 are several degrees below average so they might be the disabled cores.