DPCI Manager
Open DPCI Manager, click P States, enter your password and hit OK at any errors prompted, then you can check your CPU’s speedstep. You will have to wait for a few minutes to see all possible steps, >3 is fine.
Piker’s AppleCPUPowerManagementInfo
This is a kext exists solely for the purpose of checking speedstep, you can run the kext without having to install it by following these steps:
Step 1: Download the kext here, unzip and put the kext on your desktop
Step 2: Repair the kext’s permission and load it by type these commands in Terminal:
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cd ~/Desktop/
sudo chown –R root:wheel ./AppleIntelCPUPowerManagementInfo.kext
sudo chmod –R 755 ./AppleIntelCPUPowerManagementInfo.kext
sudo kextload ./AppleIntelCPUPowerManagementInfo.kext
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Step 3: Open Console, select All Messages and type AICPUPM in the Filter box, wait for a few minutes
Step 4: When the steps won’t increase any further, unload the kext by typing this command in Terminal:
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sudo kextunload AppleIntelCPUPowerManagementInfo.kext
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