Going back to Realtek? You'd probably be much worse off for it, especially if your board happens to be a Gigabyte GA-P35-DS3P. (I have one and know it to be ALC889A-based, alongside having some godawful noisy output if headphone mode is enabled.) Of course, that would require the X-Fi drivers to play along nicely. I'd start by trying this driver pack.
5/6/14 at 11:43pm