First of all, thank you for this guide. It's well written, incredibly detailed and properly referenced. Well done!
I'm running pretty much identical hardware.
- Intel Core i7 4790k
- Gigabyte z97mx-gaming 5
- 32GB DDR3 1600 Corsair Ballistics Tactical
- EVGA GTX 970 FTW ACX 2.0
- Samsung 850 Pro
- Fractal Design Node 804 (2xUSB3.0)
The only difference I can think of in my setup is that I used F6 bios firmware instead of F5. Because of this, I never had to adjust anything to get native power management to work properly. My CPU is under no load or temp stress at idle and it ramps up and down like you expect any CPU would. Great!
USB 3.0 however is another story. None but 1 of the front USB3 ports worked. I too used kextbeast to extract those two KEXT files /Library/Extensions/. After reboot, the USB3 ports were recognized, and system profiler displayed the ports as shown in your post, even showed USB 3.0 drives connected at 5Gbps, but actual transfer speeds were abysmal. Black magic shows write speeds at 15MB/s at best and read speeds are 90MB/s at best. More than that, anytime a USB 3.0 drive was plugged in, it would reek havoc on the USB 2.0 devices plugged in such as the bluetooth adapter. Since we're running identical hardware, I don't know what the issue could be. Any help would be appreciated.