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I7 4930K GTX 970 freezes after post install

Joined
Apr 16, 2014
Messages
1
Motherboard
Gigabyte GA-X79-UD3
CPU
i7 4930K
Graphics
GTX 970
HI, this is my system :
i7 4930K, 32GB Ram, GTX 970, Gigabyte GA-X79-UD3

A few years ago i installed 10.10.1 with not so much problems, and need to update to 10.12.1, doing a clean install in a new HD and all goes well until i reboot after the post install, no mater what i do i always get stuck in this message:
https://ibb.co/kkHfXF

Thanks in advance.

DC

Update#1

Read in other posts that adding NullCPUPowerManagement kext could do the trick, so did it and it;s working!! But, its way too slowww!!! Imposible to even open a folder, takes ages!!!

Update#2

In the Activity Monitor i can see that the kernel_task is using the CPU at 100%

Any one?? Any clues??
 
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