Sorry don't get your question.
Do you want to find out what's currently there on your board (if thats the question I think all DR31PR series boards come with the realtek chip. You can take a SPDIF output from the MB
If you are looking for an audio card for your PC let us know your budget, level of usage (just listening to MP3 or would you go for a PC based studio later? do you want connect keyboards/synths, etc for midi control?)
Do let us know