Gregow Posted September 17, 2018 Share Posted September 17, 2018 I have recently built a new Z370 system with an 8086K CPU and given it a nice little overclock. C-states, P-states, EIST and whatnot disabled in BIOS. Works as it should in Windows, but High Sierra has SpeedStep enabled for some reason and I can't figure out how to disable it. Can you help me get rid of the speed stepping? Link to comment Share on other sites More sharing options...
artur_pt Posted September 17, 2018 Share Posted September 17, 2018 hello have u try to use nullcpupowermanagement.kext ? good hack Link to comment Share on other sites More sharing options...
Gregow Posted September 17, 2018 Author Share Posted September 17, 2018 5 hours ago, artur_pt said: hello have u try to use nullcpupowermanagement.kext ? good hack Yes, I've tried that as well as using plugin type in Clover. Nothing seems to work. Link to comment Share on other sites More sharing options...
Gregow Posted September 17, 2018 Author Share Posted September 17, 2018 6 hours ago, Hervé said: But why do you want to disable SpeedStep? To keep the CPU running at LFM/HFM only and keep it warmer than required? Or is the overclock not working under HS? The trouble is that, since Haswell generations, CPU power management is handled at kernel level not through the AICPUPM kext which you could have probably removed with an older CPU I guess. Maybe you can post your Clover config to check how CPU PM is handled. Because the overclock is tested with specific settings that I've tried to carefully monitor and deemed both safe (enough) and stable. Now High Sierra acts upon it's own, despite my BIOS settings, and I don't know why nor how it affects the system. In essence: I wan't control. Here's what my config.plist looks like: https://ufile.io/9zoia Link to comment Share on other sites More sharing options...
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