In contrast to what ASUS Germany Suppport told me in an email before, (i.e. that the product is not certified and supported for Windows 8), it seems they changed mind now and put up a Windows 8.1 driver download page in December 2013 and also released a new BIOS.
The page can be found here on their support page for this model . Thanks ASUS! 🙂
And I tried it, the official Windows 8.1 USB 3 drivers of the ASMEDIA USB 3.0 ports offered on that page of the board really work now ! 🙂
Technorati Tags: USB3, Windows 8.1