Because of the Zen chipsets' design limitations, USB 3.1 transmission speeds drop dramatically as circuit distance increases, forcing PC and motherboard players to add additional retimer and redriver chips or even an independent USB 3.1 IC in order for the function to work properly. This has thus increase the makers' costs.
2 - 5$. I wonder how the final retail cost will be.
AMD Zen chipset designs have already been finalized and will begin shipments at the end of the third quarter and start mass production in the fourth.