Guest btjtaylor Posted October 22, 2023 Posted October 22, 2023 Hi all I have a Mac Pro 4,1 flashed to 5,1 with 2x X5680s installed I have an intermittent problem where some of the fan speeds in machine will go to 100%, even at idle, which is incredibly noisy, I believe I have diagnosed the issue as being with the heatsink temp sensor for CPU A, in the below screenshot you can see that some of the fans are running at 100%, and the HeatSink temp sensor is not reading a value. https://forums.macrumors.com/attachments/screenshot-2019-12-01-at-00-36-01-png.888867/ If I use a third party tool like "Macs Fan Control" I can work... Read more Source: MacRumors
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