System: GA-X79-UP4, i7-4930K, EVGA GeForce GTX 760
Followed Stork's direction, after the final reboot no audio (used Multibeast 6.5).
Under system preferences->sound no audio for input nor output.
Used Multibeaset 6.0.1 and installed without DSDT Realtek ALCxxx->ALC892
Reboot and sound is back.