This is the most asinine "solution" ever.
Don't up update Windows 10 just to keep an already faulty component functional? Don't update your OS that is still in infancy and don't update to the latest rebuild? Don't update the OS even though competent component manufacturers like Nvidia release drivers that work alongside the latest Windows 10 update. Sure, let's make all the other factors in the PC suffer because Asus can't get their **** together. A beta driver is fine, right? It's not like I paid top dollar for the most expensive motherboard on the market today.
Updated DAC driver has been released. It should be up on the Rampage V Edition 10's support page shortly.
You download it from here in the meantime: https://www.asuswebstorage.com/navigate/s/48C2B6F659824DEFB3F37F77C4455FE7Y