I am running 10.12.4 on an ASRock Z97 Anniversary with an Intel Core i7 4790. I have no output device and consequently no sound. According to ASRock I should be using Realtek ALC 887 but according to DCPIManager I have this:
0x80860C0C, 0x18490C0C, 0x80862807, 0x0000, Intel (Unknown)...