ASUS Xonar HDAV 1.3

I'm using the above sound card with ASUS AMD690G MB.
I'm running out of PCI-Ex1 slot (only one & already occupied by the sound card).
Consider chagne to AMD 790G MB (with 3 PCI-E x1-for additional raid card & TV card).
Any Ching using AMD 790G MB with ASUS Xonar HDAV 1.3 sound card-please confirm there is no confilct for the system to run smoothly to playbak bluray disc/files? Does the 790G MB good enough to "hardware" decode bluray (no need to add separate display card) & output HD audio to AV amp?

Any comment pls?