Hello guys. I have installed Mac OS x 10.9.5 on my Dell 6430u with i7 3667 2000 MHz follow these guide https://osxlatitude.com/index.php?/topic/7133-dell-latitude-6430u-with-i7-3667u-hd-4000-mavericks-1094/with pre generated SSDT for my CPU and everything was fine except turbo boost. My cpu had only two states - 795 and 1880 and geekbench was very low for these laptop - about 5200 points. Jake Lo advised me to generate my own SSDT and showed me where to find terminal commands for this. So, I`ve done that and tweak these new SSDT with changing base frequency from 800 to 900 to fully recognise my CPU. Now everything works fine, including disableturboboostonbattery kext. Intel Power gadget and Istatmenus shows right Freqency and voltage changing. In idle state the temperature is the same.
Here is my SSDT. I hope it will help you.
SSDT_i7_3667u_TurboBoost.zip
