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E5540: slow performance under Big Sur


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Thanks for the heads up.  I ran the update in OpenCore configurator to get them all in sync now.



I think the C states may not be working properly because the fan continues to run even when I have no applications running. I tried to get the Intel Power Gadget to install but that is running into it's own issues something to do with Library/Extensions. I tried what someone suggested on Reddit to fix the issue but it still won't work. 


EDIT: The fan just went off. Do you think a SSDT creation will help at all or does everything look good (or won't know unless I get the Intel app working). I may just be over picking here and everything is ok.

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