Sata, went right in, used a usb and it didn't behave any different than if it were a CD. All recognised right off the bat with no changes to bios!
With regards to sound.
My old mobo was a 5.1 also, but had a socket for all of the Tiamat 7.1 leads. This however has a separate profile in the sound section at the bottom right hand corner for my "grey" lead.
I'm used windows 8.1 (didn't really listen to sound) went up to 10. Noticed issues.
Went back to 8.1 same issues no change
So I went back to 10 and am installing all drivers as we speak