Intel SpeedStep on Yosemite Hackintosh

While using my Hackintosh today, I noticed that I only ever have the minimum frequency (800mhz, 8x100bclk) and the maximum non-turbo frequency (2.8Ghz, 28x100bclk) for my Intel i5-4440S. I was using iStat Menus to check this info and based on this, I spent a great deal of time trying to figure out how to make it work properly. I only learned much later that most utilities only report the min and max frequency and nothing in between.

Initially I tried changing the smbios to iMac 14,1 since that is closer to my system than the MacMini 6,2 definition; the iMac is Haswell and the MacMini is Ivy Bridge. Eventually I stumbled onto – a complete guide to enable proper CPU power management and well as the correct utilities to check with.

I downloaded the script to generate an SSDT file to enable the proper CPU power management:

This generated the following output:

You can see in the output above that it correctly detected and generated the missing P states in-between the min and max frequencies as well as the turbo frequencies.

Since I originally used the Multibeast option “Patched AppleIntelCPUPowerManagement”, I restored the original AppleIntelCPUPowerManagement.kext from my Unibeast installer.  Then I used Chameleon Wizard to disable the “Generate P-States” and “Generate C-States” options and enable “Drop SSDT” so the ssdt.aml generated earlier is loaded by the bootloader (ssdt.aml needs to be copied to your /Extra folder, which will do for you).

The Intel Power Gadget and AppleIntelCPUManagementInfo.kext can be used to verify whether or not power management has been correctly enabled. Below you can see the outputs from my system: