I have an almost identical build list, the only difference being a GTX 680 2GB. The build has worked out almost perfectly, except for one tough little problem. If you attempt to play an iTunes movie trailer, the system does a hard lockup, and not even the reset button will restart it, it requires the power button to be pressed for a few seconds. If I disable the IGP and just use the GTX 680, this doesn't happen, but then no Airplay support. I'm a pretty experienced hackintosh builder, been in it since 2006. I don't need anybody to try and diagnose my problem, I've tried dozens of different fixes. What I would like to ask, is if you have the same setup, that is the same motherboard and CPU, can you play an iTunes movie trailer?
Mavericks 10.9 Retail
GA-Z87X-UD5H (tried both F7 and F8c BIOS)
Core i7-4770K
GTX 680 2GB
16GB RAM, 8GBx2 (also tried 8GB, 4GBx2)
Thanks so much for any feedback!