There are two USB 3. You may notice in the picture below of the audio ports that Biostar Hi-Fi Z77X Motherboard is no option for digital coax or optical connections. The Hi-Fi ground is the yellow line you see stretching from the stainless shield cover to the Hi-Fi cap area. This ground is a multi layer PCB design which should improve signal clarity. The intent behind these features is to reduce EMI noise, eliminate interference, and isolate analog audio signals[…]
