You don't need to use Clover's HWP settings, they are unnecessary.
Just use config.plist/ACPI/SSDT/Generate/PluginType=true to enable native power management + MacBookPro14,1 SMBIOS (Default in RehabMan's config.plist for Kaby Lake) to enable HWP.
Your CPU will idle at 1.3Ghz (Per Apple's design, not a bug or something). If you want to lower it to 0.8Ghz, for example, you have 3 options:
1. freqVectorsEdit.sh - statically patching X86PlatformPlugin.kext's plist for your SMBIOS to change lowest frequency. Not recommended, as we want to keep the kext unpatched.
2. CPUFriend.kext - which can inject a modified plist for your hardware to, again, lower the minimum CPU frequency.
3. X86PlatformPluginInjector.kext - a codeless injector kext which will inject a modified plist (to lower your minimum frequency, you've got the idea, lol). This one is my favorite and the one I'm using, as you keep X86PlatformPlugin.kext native, and don't need another extra kext for your system (just a codeless injector).
You can find the appropriate plist for your hardware in /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/X86PlatformPlugin.kext/Contents/Resources.
You should patch the 4th bit of the frequency vector (Default will be 0x0C == 13). Don't patch original plist, edit a copy on your Desktop!
See this post to understand a bit more about frequencyVectors selection:
https://www.insanelymac.com/forum/t...er-management/?do=findComment&comment=2365808
Creating an appropriate injector is easy. I hope
@RehabMan will add an explanation about it in the power management guide