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Intel Power Management - i7 3820 - Catalina - OC

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Hello! I currently managed to install Catalina through OpenCore on my Build:

i7 3820

Asrock x79 extreme4-m

rx 590

8gb 2133 

the rig is fully working, except for the Power Management. I tried the ssdtprgen method but it says a board id error - because my MacPro6,1 SMBIOS and Sandy Bridge-E cpu. 
is there a way to fix the power management? Or spoof the cpu id to being recognized as an Ivy Bridge cpu? Thanks a lot! 

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