I completed the full guide. Now I have a powerful hackintosh working mostly as expected. Here's some minor issues i've been experiencing:
1. Sometimes the computer does not wake from sleep. When I hit the keyboard or mouse, nothing happens, though I see one of the keyboard leds blink whenever a key is pressed. If I hit the power key on the case, the coolers spin and leds on the motherboard light up, but I still have no video out.
Fewer times I have video back, but my keyboard and mouse still don't work. In my desk key are connected through different USB 3 hubs:
hub1 --> hub on my dell U2717 --> hackintosh
I have to cascade the hubs because cables don't reach. I suspect these keyboard issues are related to this setup, so I will further test without those as soon as I have longer cables.