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SMCAMDProcessor is respecting CPU's TDP #160

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bizkut opened this issue Nov 24, 2022 · 0 comments
Open

SMCAMDProcessor is respecting CPU's TDP #160

bizkut opened this issue Nov 24, 2022 · 0 comments

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@bizkut
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bizkut commented Nov 24, 2022

I am not sure if this is a direct issue with SMCAMDProcessor because I cannot replicate the issue without it. But macOS (Ventura 13.0.1) is running on lower power comparing to Windows using the same BIOS settings.

CPU: 5800X3D (TDP 105W)

macOS
Cinebench r23 score: 13700+
Power: 105 watts and fluctuate 2-5 watts. Literally around the TDP of the CPU
Temp: 75c

Windows 11
Cinebench r23 score: 14200+
Power: 110+ watts. More than TDP
Temp: 80c (obviously because more wattage)

The default PPT for Socket AM4 is at least 142W on motherboards rated for 105W TDP processors.
Windows 11's power management looks like doesn't really care about TDP because it is controlled by the BIOS. I believe the CPU speed is also controlled by the BIOS in macOS because I have tried to check the auto speed on and off on the gadget settings, and I got the same speed and Cinebench scores.

Is it possible to override the TDP limit and let the BIOS/UEFI controls it or maybe something like PBO2 Tuner tools to adjust PPT/TDC/EDC? Thanks.

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