ASUS HM-C D3 - motherboard - micro ATX - LGA Socket - H Audio. Audio Codec. Realtek ALC Compliant Standards. High Definition Audio. ASUS ZK motherboard, 6th Gen Intel Core i7/ i5/ i3 ASUS HM-C/CSM, microATX, LGA, Intel 6th Core i7/ i5 / i3 / Pentium / Celeron. The HM-C D3 Motherboard from ASUS is designed to fit in cases that support a Using the Realtek ALC codec, it can support channel HD audio.