@kevin_intel.
I have a Gigabyte GA-Z87N-WIFI rev 1.xx and have updated to the latest BIOS (F5 - release January 26th, 2014). I also installed the latest Intel driver (3412) as per your post (#156). I'm still having an issue with HDMI display audio dropping when power is cycled with the TV and Receiver. As per others, a reboot solves the issue.
I have attached my dxdiag.