this is what gigabyte answered me when i told my 2 uad2-solo card doesnt workon my x570 master mobo
“Which slot did you install the UAD card? It seems that you have connected several devices.
Please enabled the Above 4G Decoding to see if it works.
BIOS path: Settings → IO Ports → Above 4G Decoding → Enabled”
I havent had time to try this out yet but in some days i will go to my studio and see if it works