Asus STX doesn't work with GA-X99-Gaming 5

[sp222]

As per title, The ASUS STX PCIE sound card doesn't work properly with the  GA-X99-Gaming 5 board

I have used the card in my previous Gigabyte Z87X-OC absolutely fine.

The card is recognised by windows and installs fine, It's selected as the primary output, I have tried headphones, Direct to amp etc.

I have tried ALL of the available BIOS for the  GA-X99-Gaming 5 with no luck.

Please advise.

Thanks

[sp222]

Just to add,

After a LOT of googling, I have found others with the exact same issue but they're on ASUS x99 boards..

ASUS have said they have replicated the issue in the lab and are working on a fix, Are Gigabyte to working on a fix?

Kind regards